Dark moths are best adapted, so they survived and reproduced.
How do moths survive?
Most adult moths have a short life span. They live for a few days to a few weeks which depend on the species. Moths that hibernate through the winter, however, live for months.
Moths feed on nectar, much like butterflies. But some short-lived species of moths do not feed at all.
The larvae of moth look much like small branches. The larvae can hide well from predators by having a body that looks like a stick. The larvae even have the ability to adjust their color from brown to green. This is to best match the branches they are feeding on..
These moths play a very important role in food webs and are also an important food item for songbirds, mammals, and other insects.
Therefore, dark moths are best adapted, so they survived and reproduced.
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what possible genotype could a long-necked, short-legged, light-spotted, meat-digesting giraffe have?
The possible genotype of a long-necked, short-legged, light-spotted, meat-digesting giraffe is NnllddMM.
In giraffes, the long neck (N), long legs (L), dark spots (D) and the ability to digest meat (M) are all dominant traits. The long neck is the most dominant trait. It can be gay or straight, and always get the long neck trait. The light spots must be homogeneous. If we want to be a dominant trait, we have to be recessive to homogeneity. We can be heterosexual or homosexual here. There is a possibility of a short-necked, short-legged, dark-spotted, meat-digesting giraffe. He must be homosexual if he starts with a short neck. Homosexuals have the same trait. For the spotted, it can be either homosexual or heterosexual. The dominant trait is either dominant homosexuals or heterocyclics. If we are looking for the dominant trait to have a long, then any combination of these traits would give us that trait, and if we are looking for the big and small trait, it would always give us that trait. We would have short legs by Little L. It's a trait of two giraffes. The capital M and the light dots would give us the dominant feature of meat digestion.
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which photosystem is responsible for the production of atp and o2? which photosystem is responsible for the production of nadph?
Thus, the Calvin cycle enzymes in the chloroplast stroma utilise both ATP and NADPH that are produced when electrons flow through photosystems I and II to convert CO2 to carbohydrates.
photosystem I
What is photosystem?The two multi-protein complexes known as photosystem I and photosystem II contain the pigments required to collect photons and utilise light energy to catalyze the fundamental photosynthetic endergonic processes that result in high energy molecules.
Chemiosmosis and ATP synthesis in the chloroplast are triggered by Photosystem II. The reduced pheophytin transfers electrons to an electron transport chain in the thylakoid membrane. This ETC resembles the mitochondrial ETC in terms of both structure and function.
An essential membrane protein complex called photosystem I uses light energy to catalyze the movement of electrons from plastocyanin to ferredoxin across the thylakoid membrane. The moderate-energy hydrogen carrier NADPH is ultimately created using the electrons that Photosystem I transfers.
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3) the seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.
The seed coat's most important function is to provide desiccation resistance.
What is desiccation resistance?
The term "desiccation tolerance" describes an organism's capacity to withstand or endure conditions of extreme dryness or drought-like conditions. Physiological or behavioural adaptations to endure these periods have been required to ensure the survival of animals and plants that live in arid as well as periodically arid environments, such as transient streams or ponds. In particular, insects use a variety of defence mechanisms to prevent desiccation because they occupy a broad range of ecologically diverse niches. Typically, the change in mass under dry conditions is used to gauge an insect's desiccation resistance. As respiratory water loss is typically regarded as negligible, the overall mass difference among measurements before and following exposure to aridity is credited to body water loss.
It helps seed to remain dormant within the seed coat and germinates when there are favorable conditions. It absorb water and under stressful conditions provides it to the germinating seed .
Hence , the basic and most important function of seed coat is desiccation resistance.
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when a neuron is at its resting potential view available hint(s)for part a when a neuron is at its resting potential sodium-potassium pumps transport sodium ions into the cell. sodium-potassium pumps transport both sodium and potassium ions out of the cell. gated sodium channels are open. there are more potassium ions inside the neuron than outside. the inside of the cell is positively charged relative to the outside.
When a neuron is not producing an electrical signal, it is at rest. During this period, the neuron's inside is negatively correlated with its exterior.
Once the sodium channels open, the neuron totally depolarizes to a membrane potential of about +40 mV. Action potentials are referred to as "all-or-nothing" occurrences because, once the threshold potential is reached, the neuron always completely depolarizes. Most animal cells have a negative resting membrane potential because their interiors are more negatively charged than their exteriors. The resting membrane potential can only be accurately described in this way.
Na+ is drawn to the inside of dormant neurons by two different mechanisms. The high concentration of Na+ outside the cell initially pushes Na+ down the gradient of concentration into the cell. Second, the negative charge of the neuron creates an electrical gradient that tends to pull the positively charged ion within the cell.
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on october a company committed to a plan to sell a division that qualified as a component of the entity according to gaap regarding discontinued operations and was properly classified as held for sale on december. the division's loss from operations
The -tax amount(s) should Mercedes report as loss on discontinued operations in its 2016 income statement is that no loss was found.
Here we will show the amount of loss :
The amount is $2,000,000 loss, $2,500,000 loss.No loss would be reported.$500,000 impairment loss included in continuing operations and a $2,000,000 loss from discontinued operations.$2,500,000 loss.$2,000,000 loss from operations and $500,000 impairment loss= $2,500,000The amount or income of loss that is described here is impaired lis and is called as impairment loss that is of $2,500,000.
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The complete question is this :
On October 28, 2016, Mercedes Company committed to a plan to sell a division that qualified as a component of the entity according to GAAP regarding discontinued operations and was properly classified as held for sale on December 31, 2016, the end of the company's fiscal year. The division's loss from operations for 2016 was $2,000,000.
The division's book value and fair value less cost to sell on December 31 were $3,000,000 and $2,500,000, respectively. What before-tax amount(s) should Mercedes report as loss on discontinued operations in its 2016 income statement?
suppose a mismatch is introduced during dna replication. is this considered a mutation? why or why not?
Yes this is considered as mutation.
What is mutation?
A mutation in biology is an adjustment to the sequence of nucleic acids of an organism's, virus's, or extrachromosomal DNA. DNA or RNA can be found in the viral genome. Errors in DNA replication, viral replication, mitosis, meiosis, or other types of DNA damage (such as pyrimidine dimers from exposure to ultraviolet radiation) can result in mutations, which can then result in error-prone fix (especially microhomology-mediated finished joining), error-causing repair in other forms, or error-causing replication (translesion synthesis). Due to mobile genetic elements, mutations can also result from the insertion or deletion of DNA segment.
Mismatch occurred during DNA replication completely changes the information and same changed information is then pass to other generation and so on.
Hence, this mismatching is considered as.
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which term describes the process of sister chromatids not separating at the centromere during cell division? karyokinesis aneuploidy desegregation nondisjunction
Non-disjunction is the process of sister chromatids not separating at the centromere during cell division.
What is cell division?
The process by which a parent cell divides into two daughter cells is known as cell division. Cell growth and chromosome replication precede cell division, which often happens as part of a longer cell cycle. Mitosis and meiosis are the two distinct processes of cell division. When people talk about "cell division," they typically mean mitosis, which is the process of creating new cells for the body. The cell division process known as meiosis is what produces egg and sperm cells. A vital process for life is mitosis.
Hence the answer is non-disjunction.
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there are several ways the immune system can defend the body against pathogens. click and drag to distinguish specific from nonspecific immunity.
The several ways how an immune system can defend the body against pathogens are:
1) Mechanical and chemical barriers as the first line of defense
2) The inflammatory response and phagocytosis are the second line of defense.
3) Natural killer cells and specific immunological responses serve as the third line of defense.
There are three layers of defense in immune function, which is the internal environment's defense against invading cells, proteins, and viruses. A series of barriers between the internal and external environments serves as the initial line of defense.
The innate inflammatory response (including phagocytosis) makes up the second line, while the adaptive immune responses and the innate defense provided by natural killer cells make up the third line.
Of course, the first two lines of defense do not apply to tumor cells that develop inside the body, thus the third line of defense must be used to combat them. This illustration is a condensed version of the complex immune system operation; in reality, there is a lot of mechanism overlap between various "lines of defense."
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after a reciprocal translocation occurs between chromosome ii and iv, what will be the chromosome contents for these two chromosomes in the nucleus?
In reciprocal translocation, segments are exchanged between two non-homologous chromosomes. So, it involves one break in each of the involved chromosomes. Almost every translocations are reciprocal translocations.
In a reciprocal translocation, the four chromosomes in which the two derivative and two normal will be the outcome. This four chromosome structure known as a ‘quadrivalent’. Two of these chromosomes will pass into the gamete. Reciprocal translocations occur when a portion of one chromosome is exchanged for a portion of another. Translocations can disrupt functional parts of the genome, affecting protein production and having phenotypic consequences. Reciprocal translocations are typically balanced, so they may not have obvious functional implications.
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what are the general functions of digestive system? what are the processes that digestive system carries out?
Food is broken down into nutrients such as carbohydrates, fats, and proteins by the digestive system.
The gastrointestinal tract, as well as the digestive organs, comprise the human digestive system. Digestion is the process of breaking down food into smaller and smaller components so that it can be absorbed and assimilated by the body.
Peristalsis is the movement of food through your GI tract. Your GI tract's huge, hollow organs include a layer of muscle that allows their walls to move. The movement forces food and liquid through your GI tract, mixing the contents of each organ.
The digestive system ingests and digests food, absorbs released nutrients, and excretes indigestible food components. Ingestion, motility, mechanical digestion, chemical digestion, absorption, and defecation are the six activities involved in this process.
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why do lipoprotein particles (e.g. vldl) only have a monolayer of phospholipids instead of a typical lipid bilayer?
Lipoprotein particles only have a monolayer of phospholipids because the phosphate of the lipids interacts with the triglycerides and cholesterol esters of the particle. The monolayer protects the particles from bile acids.
What is the role of the phospholipid monolayer at the outer surface of lipoprotein particles?
The lipid monolayer, along with binding proteins, that surround lipid droplets is what helps stabilize the oil drop in the aqueous cell environment due to the amphipathic nature of these molecules.
What are the functions of lipid monolayer?
Lipid monolayers are used as experimental model systems to study the physical-chemical properties of biomembranes. With this purpose, surface pressure/area per molecule isotherms provide a way to obtain information on the packing and compressibility properties of the lipids.
What is the difference between monolayer and bilayer?
The difference is that in bilayers the flux of solution is expressed as a volume change of the vesicles and in monolayers as an area change. By extension, the same approach should apply to the surface pressure area lipid process.
Thus, the monolayer protects the particles from bile acids.
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The genetic material of an offspring of sexually reproducing organisms is best described as.
The offspring of sexually reproducing organisms has genes from both parents, in unique combinations.
What is genetic material?
The hereditary substance in the cell is the genetic material. Genetic material carries all information that is specific to an organism.
Genetic material is also known as DNA (deoxyribonucleic acid) or RNA (ribonucleic acid).
DNA is found in the cytoplasm of prokaryotes like bacteria. DNA is found in the nucleus of the cell and sometimes in extranuclear sites like mitochondria (containing mtDNA) and chloroplast (containing cpDNA) in eukaryotes such as plants and animals.
Genetic material is responsible for controlling the organism’s composition. In the somatic cells of a multicellular organism, it is also identical.
The genetic information is passed from parent to offspring during reproduction. In sexual reproduction, the offspring gets the genetic material from both its parents.
Therefore, the offspring of sexually reproducing organisms has genes from both parents, in unique combinations.
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A piece of dna on a chromosome that once coded for a gene but now does not and begins to accumulate mutations would be.
A piece of dna on a chromosome that once coded for a gene but now does not and begins to accumulate mutations would be altering the normal cell functions.
DNA is a flexible and dynamic molecule. As a result, due to a process known as mutation, the nucleotide sequences found therein are liable to alter. A mutation is a change to a gene's DNA sequence. While certain mutations can be dangerous, most do not. A mutation might alter a property in a way that's even advantageous, such making it possible for an organism to more effectively adapt to its surroundings.
Normal cell replication and apoptosis rates can both be impacted by DNA damage, also known as "cellular senescence" or "programmed cell death." Alternately, harm to genetic material can cause cellular dysfunction, cell death, or the development of cancerous cells from normally healthy cells.
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what is the mechanism of action of vasopressin? what is the mechanism of action of vasopressin? decreasing the resistance in the afferent arteriole closure of v2 receptor channels, preventing sodium movement and osmosis of water from the tubule to the interstitial pace opening of aqp2 channels in the basolateral surface of proximal tubule cells insertion of aqp2 into the apical membrane of collecting duct cells
Vasopressin is crucial for maintaining cardiovascular homeostasis because it controls water resorption through the kidney, smooth muscle tone in the vasculature, and brainstem autonomic function as a key neurotransmitter.
What is Vasopressin?
Vasopressin is a naturally occurring hormone that helps to control a number of bodily functions.
Vasopressin maintains the proper level of water around cells in the body, allowing for optimal cellular activity.
Vasopressin controls the circadian rhythm, or the intervals between sleepiness and wakefulness within a 24-hour cycle.
The body's blood volume, internal temperature, and proper kidney urine production are all maintained by vasopressin.
Both men and women naturally produce the hormone vasopressin, but due to the way it interacts with the hormone responsible for male sex, testosterone, men are more susceptible to its effects.
The pituitary gland secretes vasopressin into the bloodstream after it is produced by nerve cells in the hypothalamus at the base of the brain.
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Biologists divide the biosphere into ______, which are the major types of ecosystems on earth.
A geographically large form of ecology is called a biome. Numerous approaches have been developed by ecologists to categorize the biosphere into major biomes.
What criteria are used to categorize biomes?Based on the species that live there, a place is classified as a biome. Scientists can describe a biome by describing the temperature range, soil type, amount of light, and water that are particular to a location and provide niches for specific species.
What biome has warm summers and freezing winters? trees that progressively lose their leaves?The prominent trees in this biome are called after them because they lose their leaves in the winter. These forests may have a 20 to 30 m tall overstory and a 5 to 10 m tall understory.
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What is the role of ATP in transport across a cell membrane?
1 .ATP is an amino acid that is used to build transport proteins.
2. ATP is an energy molecule that helps with active transport.
3. ATP is an enzyme that speeds up chemical reactions in the cell.
4. ATP is a carrier protein that transports substances across the cell membrane.
Answer:
2. ATP is an energy molecule that helps with active transport.
Explanation:
ATP is used to transport molecules across the membrane through active transport. Active transport means moving molecules from a less crowded area of a cell to a more crowded area. This transport requires energy in order to carry out the transfer, so energy molecules/ATP is required.
A segment of dna is represented in the illustration. How is information for a specific protein carried on the dna molecule?.
Answer:
Messenger RNA (mRNA)
Explanation:
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invasive species are of great concern because their eradication or management can cause both high economic costs and the decimation of native populations of flora and fauna. what is one of the reasons why invasive species tend to thrive in areas where they are introduced?
Answer:
The lack of natural predators allows invasive populations to increase very quickly.
Type 1 diabetes patients are advised by the doctors to intake prescribed doses of the insulin hormone at regular intervals .what could be considered as a milestone for the treatment of type 1 diabetes
What can be considered as a milestone for the treatment of type 1 diabetes is the use of insulin hormone therapy.
What is type 1 diabetes?Type 1 diabetes is defined as the type of metabolic disorder that occurs when the pancreatic islet cells fails to produce the hormone insulin or produces an insignificant amount of insulin.
The clinical manifestations seen in patients with type 1 diabetes include the following:
Feeling more thirsty than usual.Urinating a lot.Bed-wetting in children who have never wet the bed during the night.Feeling very hungry.Losing weight without trying.The best treatment milestone that can be used for individual with type 1 diabetes is the use of insulin hormone therapy.
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fatty acids are adenylated prior to reacting with coenzyme a to make acyl-coa. what is the purpose of the adenylation?
The purpose of adenylation is Adenylation causes ATP to be added to acyl chains, Which allows for the length of the acyl chain to increase, Adenylation inhibits the interaction of Acyl-CoA with Coenzyme A, and This forms a phosphodiester bond that Coenzyme A can "attack." A correct answer is an option(e).
Adenylation is a tasteful organic process used to chemically mobilize carboxylate substrates by condensing bureaucracy accompanying ATP to save pyrophosphate (the hidden motive). The adenylation (A) rule selectively combines alike amino acids into NRPs from a much best monomer pool, including all 20 proteinogenic amino acids, in addition to any of nonproteinogenic amino acids, aryl acids, oily acids, and hydroxy acid construction blocks.
A fatty acid is a carboxylic acid with an aliphatic chain, that is either soggy or unsaturated. Dietary grease holds a combination of soggy, monounsaturated, and polyunsaturated fatty acids. Foods are frequently classified apiece ruling type of oily acids they hold, even though meals hold all three types.
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The complete question is:
Fatty acids are adenylated prior to reacting with Coenzyme A to make Acyl-CoA. What is the purpose of adenylation?
a. Adenylation leads to the addition of ATP to acyl chains.
b. This allows for the growth of acyl chain length.
c. Adenylation prevents Acyl-CoA from interacting with Coenzyme A.
d. This creates a phosphodiester bond that can be "attacked" by Coenzyme A.
e. All of the above
What is one way radon destroys genetic information in lung tissue cells?
A. Radon breaks up genetic information in DNA with high energy waves.
B. Radon destroys RNA in the cells nucleus.
C. Radon causes oxygen to to heat up and expand in the lungs which destroys the lung tissue.
D. Nitrogen in the air is absorbed in the lungs leading to respiration problems.
Radon destroys genetic information in lung tissue cells because:
Radon breaks up genetic information in DNA with high-energy waves; option A is correct.What is a mutation?A mutation is a change that occurs in the sequence of nucleotides in a DNA molecule.
Mutations occur naturally during the process of DNA replication.
However, mutations can also occur as a result of environmental factors such as diet, chemicals, ionizing radiation as well as several other yet-to-be-understood mechanisms.
The production of ionizing radiation disrupts the sequence in a DNA molecule. An example of a molecule that causes a mutation in Radon.
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An investigator proposes a study to determine the clinical relevance of a new technique to quantitate minimal residual disease (mrd) during therapy for acute lymphoblastic leukemia in adolescents. The study requires that two additional bone marrow aspirates be performed during the course of treatment. The subject's treatment will not be altered based in the results of the assay, but if the presence of minimal residual disease is found to predict for higher risk of relapse, future patients with this disease would benefit from improved treatment. This study is approvable only if:.
The study will only be approved if there is the permission of both the parents as well as the assent of the child.
In the said study, the investigator has basically proposed a study in order to tell the clinical relevance of some new technique which basically quantitates the MRD or the minimal residual disease during the therapy for the acute lymphoblastic leukemia which is seen in the case of adolescents.
Since the study basically requires that two more bone marrow aspirates which have to performed while the patient is being treated. This study can only be approved if both of the parents give their permission and also there is the assent of the child.
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rank the following line-angle structures based on the number of carbon atoms present in the longest continuous carbon chain. rank from highest to lowest. to rank items as equivalent, overlap them.
The rank of the line-angle structures is based on the number of carbon atoms present in the longest continuous carbon chain attached in the image.
A hydrocarbon is an organic compound in organic chemistry that is only hydrogen and carbon. The majority of hydrocarbons lack color and are hydrophobic. Typically, their mild odors are compared to gasoline or lighter fluid.
In line-angle structures, carbon atoms are seen at the ends and corners of lines. It is assumed that each carbon atom has four bonds because it is attached to enough hydrogen atoms.
By counting the number of carbon atoms in each compound's branched chain, we can arrange the structures in the image attached.
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The nematode c. Elegans has approximately 19,000 genes, while humans have 25,000. Although the number of genes is similar, humans can make more than 4x as many proteins as c. Elegans. What is the most plausible explanation for this phenomenon?.
Telomerase malfunction, poor telomere maintenance, and shorter telomeres are all caused by TERC gene mutations. The effects of shorter telomeres are especially harmful to cells that divide quickly.
How does positive control affect the expression of the genes in the lac operon?Two distinct proteins govern the activity of the promoter, which manages the lac operon's expression. One of the proteins stops RNA polymerase from trancribing (negative control), while the other improves RNA polymerase's ability to attach to the promoter (positive control).
Which kind of mutation affects the order of amino acids in a protein the most?A missense mutation is a DNA change that leads to a different amino acid encoding at a particular location in the protein.
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opening of sodium channels in the axon membrane causes hyperpolarization and increased negative charge inside the membrane. hyperpolarization and decreased positive charge inside the membrane. depolarization and increased positive charge inside the membrane. depolarization and increased negative change inside the membrane. repolarization and increased positive charge inside the membrane.
The correct option (d) Both depolarization and increased positive charge inside the membrane.
Depolarization or hypopolarization is a change within a cell that occurs when the cell's electric charge distribution shifts, resulting in less negative charge inside the cell relative to the outside.
What happens during a depolarization?
The gated sodium ion channels on the neuron's membrane suddenly open during the depolarization phase, allowing sodium ions (Na+) present outside the membrane to rush into the cell. The internal charge of the nerve changes from -70 mV to -55 mV as sodium ions enter the cell quickly.
The entry of sodium and calcium ions caused by the opening of membrane channels causes depolarization.
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zinc in its 2 oxidation state is an essential metal ion for life. zn2 is found bound to many proteins that are involved in biological processes, but unfortunately zn2 is hard to detect by common chemical methods. therefore, scientists who are interested in studying zn2 -containing proteins frequently substitute cd2 for zn2 , since cd2 is easier to detect. (a) on the basis of the properties of the elements and ions discussed in this chapter and their positions in the periodic table, describe the pros and cons of using cd2 as a zn2 substitute. (b) proteins that speed up (catalyze) chemical reactions are called enzymes. many enzymes are required for proper metabolic reactions in the body. one problem with using cd2 to replace zn2 in enzymes is that cd2 substitution can decrease or even eliminate enzymatic activity. can you suggest a different metal ion that might replace zn2 in enzymes instead of cd2 ? justify your answer.
a)The pros of replacing zn2+ by cd2+ is that Zn metallothionein was able to efficiently compete with Cd2+, Zn2+ was restored to these proteins for the first time. When Zn2+ is exclusively coupled to Cys-thiolate in mammalian metallothionein, clusters are formed that are both kinetically labile and thermodynamically stable for the metal.
The cons of replacing zn2+ by cd2+ is Cd2+ damages kidney proximal tubule cells
b) Co and Zn can completely replace one another, with the possible exception of minor individual needs that can be satisfied
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The _________ lobe contains the primary motor cortex and mirror neurons. a. parietal b. frontal c. occipital d. temporal
The primary motor cortex, which is in charge of regulating muscle motion, is located in the frontal lobe.
The primary motor cortex and mirror neurons are located in which lobe?The back of the frontal lobe houses the primary motor cortex. The body is somatotopically shown and inverted, with the face taking up more space than the lower leg.
The parietal lobe contains the motor cortex, right?The central sulcus, a sizable sulcus located close to the motor cortex in the frontal lobe of the brain, is where the motor cortex is located. The central sulcus is a groove that runs between the frontal and parietal lobes of the cerebral hemispheres.
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before it opens up into full blossom, the outer green layer of a rosebud consists of the leaflike a) stamen. b) petals. c) ovary. d) sepals.
Before it opens up into full blossom, the outer green layer of a rosebud consists of the leaflike d) sepals.
Sepals are the flower's small, leaf-shaped, green petals on the outside. They are the vegetative part of a flower that protects the emerging buds and supports the petals when they are in bloom. The sepals are thought to be modified leaves.
The sepal is a defensive organ that protects and encloses the developing reproductive structures. When the flower matures, the sepal opens and the flower blooms.
Petals are modified leaves that surround a flower's reproductive parts. To attract pollinators, they are frequently brightly colored or unusually shaped. The corolla is the collective name for a flower's petals.
The stamen is a flower's pollen-producing reproductive organ. The androecium is made up of stamens. In botany, the ovary is the enlarged basal portion of the pistil, a flower's female organ. Ovules are found in the ovary and develop into seeds after fertilization.
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What does it mean when says a lake has high turbidity
Answer:The higher the intensity of scattered light, the higher the turbidity
Explanation:
Turbidity is the measure of relative clarity of a liquid. It is an optical characteristic of water and is a measurement of the amount of light that is scattered by material in the water when a light is shined through the water sample. The higher the intensity of scattered light, the higher the turbidity
how many sets of chromosome 21 are present in each cell after 1) mitosis, 2) meiosis, and 3) if a nondisjunction event occurred during anaphase i?
Each daughter cell will have half of the original 46 chromosomes, or 23 chromosomes. Each chromosome consists of 2 sister chromatids. The daughter cells now move on to the third and final phase of meiosis: meiosis II.
At the end of meiosis I there are two haploid cells. Most of complete trisomy 21 is caused by chromosome nondisjunction that occurs during maternal meiotic division (∼90%). Errors occur more frequently in the first maternal meiotic division than in the second. Nondisjunction can occur during meiosis I and meiosis II, resulting in abnormal number of gamete chromosomes. The key difference between nondisjunction in meiosis 1 and 2 is that during meiosis 1, the homologous chromosomes do not separate while in meiosis II the sister chromatids do not separate. Each chromosome contains 1 DNA in anaphase II meiosis. The remaining centromeric cohesin is cleaved in anaphase II, allowing segregation of sister chromatids. The mother cell remains diploid in nature (46 chromosomes in each cell) after meiosis I. After meiosis II, when each mother cell divides into two gametes, each gamete cell contains 23 chromosomes.
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