The 992 mice of the F1 generation were all covered in black fur. These mice produced 961 black-coated offspring and 317 brown-coated offspring when they were crossed.
How could you explain the proportion of brown- and black-coated mice in the F2 generation? Please check all that apply.The dominance of the black allele over the brown allele in the F2 generation accounts for the roughly three-to-one ratio of black to brown coated mice. In the F1 generation, the brown allele segregates with the black allele and completely vanishes.
What inference did Mendel make from the F1 offspring of this cross?He created monohybrid crosses between plants that had spherical seeds and those that had seeds that were wrinkled. What inference did Mendel make about this cross's F1 generation For round seeds, there is a dominant allele.
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sort each process into the appropriate bin to indicate the stage of mitosis in which it occurs. if a process occurs in more than one stage, sort it to the stage when it first occurs. prophase prometaphase metaphase anaphase telophase
Sister chromatids of a duplicated chromosome are joined by cohesions. Assembling tubulins to form spindle microtubules
Prophase. Prophase, the first stage of mitosis, sees the recruitment of condensin and the start of the condensation process that lasts until metaphase. The chromosomes decrease and thicken during prophase. Chromatids split across the centromere and migrate to opposing poles during anaphase. Telophase: Following the reorganization of nuclear envelopes surrounding each cluster of chromosomes, two nuclei are created by cohesion. Prophase, Metaphase, Anaphase, & Telophase are the four fundamental stages of mitosis by cohesions. Cytokinesis, the process of splitting the contents of the cell to create two new cells, begins in either anaphase or telophase and occurs in this exact sequential manner.
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(a) Why are men never heterozygous for an X-linked trait? (b) Why
must men always inherit an X-linked trait from their mothers? (c)
Can a color-blind father pass this allele on to his sons? Explain. (d)
Can a normal male ever have a daughter that is color-blind? Explain
Answer:c
Explanation:edge 2022
for any given species or larger taxonomic group, such as mammals, extinction is most likely caused by
destruction of habitat and the introduction of non-native species, including the spread of disease. The greatest threat facing the majority of endangered species in the United States today is habitat destruction.
The process through which a natural habitat loses the ability to support its native species is known as habitat destruction, also known as habitat loss and habitat reduction. Reduced biodiversity and species abundance result from the displacement or death of the organisms that once occupied the area. The loss of biodiversity is primarily caused by habitat destruction. Given that they pose significant risks to the survival of endangered species, fragmentation and habitat loss have emerged as two of the most crucial ecological research areas.
Humans contribute to habitat deterioration through practises including resource extraction, manufacturing, and urbanisation. The primary human cause is pressure from agriculture. Urban sprawl, mining, logging, and trawling are a few more. Currently, it is believed that habitat destruction is the main reason why species are vanishing from the planet.
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if the diameter of the afferent arterioles leading to the glomerulus increases (vasodilation) which of the following is not likely to occur? group of answer choices systemic blood pressure will go up. glomerular filtration rate will increase. urine output will increase. net filtration pressure will increase.
c) Systemic blood pressure will go up is not likely to occur if the diameter of the afferent arterioles leading to the glomerulus increases.
The kidney, which is an excretory organ, filters blood. Nephrons, a large number of tiny units that make up the kidney and are in charge of blood filtration.
Glomerular filtration takes place in the renal corpuscle of the kidney, which is a component of the nephron. Hydrostatic and colloid osmotic pressure drives this process.
The diameter of afferent arterioles affects the pressures collectively known as net filtration pressure.
Net filtration pressure will rise if the arterioles dilate, and it will fall if the arterioles constrict. Hormonal, renal, and neurological modulation all affect this process.
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Activity 4. In a monohybrid cross of corn plants, purple seeds (p) are dominant to yellow (y). Both parents in the original cross are homozygous. What are the possible gametes for the purple parent?.
In a monohybrid cross of corn plants, purple seeds (p) are dominant to yellow (y). Both parents in the original cross are homozygous. The possible gametes for the purple parent are p.
An organism's genotype generally refers to the genetic makeup of the organism. Each gene is represented by two alleles, also known as alternative forms of the gene.
When the same alleles represent a gene, such genes are called homozygotes, whereas when the alleles differ, such genes are called heterozygotes.
In this case, the purple seed allele is denoted by p and the purple parent is said to be homozygous. Therefore, the genotype is definitely pp.
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The lipoproteins that carry absorbed lipids from the intestinal tract to the bloodstream are
chylomicrons.
The correct option is D :Chylomicrons are very large lipoproteins that transport lipids from the intestinal tract and are released into the circulating venous blood at the jugular and subclavian veins.
They are predominantly composed of triglycerides and phospholipids (9%), cholesterol (3%), and apoprotein (1%). When blood passes through the capillaries of different tissues, including adipose tissue, skeletal muscle, and the heart, the majority of chylomicrons are eliminated. As a result, the lipoproteins known as chylomicrons are responsible for transporting absorbed fats from the digestive tract to the blood.
These particles, which are derived from VLDL and IDL particles, have even more cholesterol added to them. The majority of the cholesterol in the blood is carried by LDL. Each LDL particle contains one Apo B-100 molecule, which is the most common apolipoprotein.
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Full Question ;
The lipoproteins that carry absorbed lipids from the intestinal tract to the bloodstream are
A. HDLs
B. VLDLs
C. LDLs
D. Chylomicrons
in hemoglobin, multiple choice question. oxygen attaches to the fe atom in the heme, while carbon dioxide attaches to a cu atom in the protein portion. oxygen attaches to the fe atom in the heme, while carbon dioxide attaches to the protein portion. oxygen attaches to the protein in portion, while carbon dioxide attaches to the fe atom in the heme.
Which choice is utilized by eukaryotes to control their gene expression that is not used in bacteria?.
Eukaryotes, unlike bacteria, use control of chromatin remodeling and RNA splicing to regulate their gene expression.
How do eukaryotes regulate the expression of their genes?Both transcriptional activators and repressors control how genes are expressed in eukaryotic cells. Eukaryotic repressors function similarly to their prokaryotic counterparts in that they bind to specific DNA sequences and suppress transcription.
What method does eukaryotes, but not prokaryotes, primarily use to regulate gene expression?Transcription has a major role in regulating prokaryotic gene expression. Epigenetics, transcription, post-transcription, translation, and post-translation are all involved in the regulation of eukaryotic gene expression.
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Determine whether the following statement is true or false and why:Homologous recombination occurs only between DNA molecules that are identical in nucleotide sequence without any variation.
- false, because only similar sequence is needed
Homologous recombination occurs only between DNA molecules that are identical in nucleotide sequence without any variation is false because (C) false, because only a similar sequence is needed.
The genetic material exchange among non-sister chromatids of homologous chromosomes is referred to as homologous recombination. It indicates that the same gene locus on the two chromosomes exchanges genetic material. The chromosomes that share the same gene locus may have the same or a separate allele for that gene at that location. It indicates that for similar recombination to happen, a comparable sequence is necessary. If A A and a are alleles of the same gene, it will happen between A-A or A-a.
It's not always necessary to follow an identical order. As a result, the statement is not correct.
The complete question is attached.
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9. hypersensitivity reactions to penicillin have been identified that correspond to what type of reactions?
However, hypersensitivity is its main side effect, which can cause nausea, vomiting, pruritus, urticaria, wheezing, laryngeal oedema, and finally cardiovascular collapse.
Any unfavorable immune system-induced reactions, such as allergies and autoimmune diseases, are referred to as hypersensitivity (also called hypersensitive reaction or intolerance). These reactions—often referred to as an immune system overreaction—can be harmful and painful. Contrast this immunologic phrase with the psychiatric term "hypersensitive," which refers to someone who may be abnormally sensitive to physical (such as sound, touch, light, etc.) and/or emotional stimuli in immune system. Despite the fact that there is a correlation between the two, research have shown that those with ADHD (a psychiatric disease) are more likely to also have hypersensitivity reactions.
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the most common complication of pregnancy is: group of answer choices gestational diabetes preeclampsia severe nausea and weight loss caused by hyperemesis gravidarum ectopic pregnancy
Most women in pregnancy experience nausea & vomiting, and only a small minority experience the extreme variant known as hyperemesis gravidarum.
Preterm birth, fetal growth restriction (FGR), intrauterine fetal mortality, and HELLP syndrome with increased risk of liver rupture and eclampsia are the most frequent consequences associated with preeclampsia. It's typical to have nausea or sickness in the early weeks of pregnancy. Although some women may experience morning sickness for more than three months, it often happens during the first 3 months of pregnancy. Even though it is referred to as morning sickness, it might continue all day. If a woman does not already have diabetes, she may acquire gestational diabetes during pregnancy. Gestational diabetes affects somewhere between 2% and 10% of pregnancies each year in the US. Maintaining control of gestational diabetes will ensure a safe pregnancy and healthy birth.
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The cycle of events that initiates gonadarche involves signals from the hypothalamus to the pituitary gland, which secretes hormones that in turn stimulate production of hormones in the __________________.
GONADS
The testes in men and the ovaries in women are the gonads, which are the primary reproductive organs. Sperm and ova are produced by these organs, which are termed endocrine glands since they exude hormones.
A mixed gland that creates both an organism's gametes and sex hormones is known as a gonad, sex gland, or reproductive gland. Male and female reproductive cells are called sperm and egg, respectively. Sperm are created by the male gonad, or testicle, in the form of spermatozoa. Egg cells are made in the ovary of the female gonad. These haploid gametes are both present. An ovotestis is a particular kind of gonad seen in several hermaphrodite mammals.
In certain lower invertebrate taxa, the gonads are transitory organs, whereas in higher forms, they are permanent. One invertebrate, such as an oligochaete worm or a leech, can have both male and female gonads. Sponges lack distinct gonads; instead, amoebocyte clusters in the body wall give rise to reproductive cells. The gonads of echinoderms, such as starfish, are typically hanging from the radiating arms directly into the water.
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write a sentence that compares the reactants and products of photosynthesis with the reactants and products of cellular respiration
Answer:
The reactants of photosynthesis are carbon dioxide and water, which are the products of cellular respiration.
Wildlife biologists use methods which __________ in order to control the brown tree snake population on Guam.
A) capture and kill the snakes, increasing death rates
B) anesthetize the snakes with acetaminophen in rats
C) use specially trained dogs to prevent spread to other islands
D) release sterilized males to compete with wild fertile males
E) All of the answer choices are correct.
Wildlife biologists are using a method which anesthetize the snakes with acetaminophen in rats in order to control the brown tree snake population on Guam. (B)
Food chainIn an ecosystem, there are interactions between living things which then produce energy flows and material cycles. Every living thing also needs nutrition (food) and energy that varies depending on the place and conditions. Living things also need air, soil, and sun to then be able to support their lives.
For example, humans need animals, and plants and vice versa. Interactions between living things can also be divided into coexisting or crossing life, although of course living things can also prey on each other.
The relationship between what eats and is eaten is what is called the understanding of the food chain.
Trophic level
Producers: Producers are organisms capable of producing their own food, including autotrophic organisms or green plants. Producers also occupy the first trophic level.Consumer I: In consumer I Organisms that occupy the second trophic level are also known as primary consumers. Among these primary consumers are herbivorous animals.Consumers II: Organisms that occupy the second trophic level are also known as secondary consumers, and are occupied by meat-eating animals (carnivores) and so on.Top consumers: The organisms occupying the highest trophic level are the top consumers.Decomposers: Decomposers which then form the final link in a food chain will break down plants and animals which then die and return various essential nutrients to the soil.Learn more about the Food Chain at: https://brainly.com/question/16504883
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If dermal papillae were missing, then __________.
a. friction ridges would be absent
b. excess water loss would occur
c. keratin could not be produced in the skin
d. sebum secretion would be absent
If whales evolved from land-dwelling mammals, one would expect the fossil record to include intermediate forms, creatures more whale-like than land-dwelling mammals yet still possessing hind limbs and a pelvis lacking in modern whales. Such intermediates are termed __________.
In the evolution of whales, transitional forms include Pakicetus and Ambulocetus.
What is the proof that whales diverged from land mammals?There are several indications that whales originated on land when examining their bodies and biology. Their paddle-shaped flippers, which enclose hand bones with five "fingers," have the shape of paddles, and they breathe air and nurse their young with their own milk.
Why does the whale fossil record serve as a useful illustration of how evolution works?Whales travel through various transitional forms, such as the Pakicetus, Rhodecetus, Dorudon, and Balena, which allow researchers come up with a thorough development of whales through those fossils. Whale fossil records provide an excellent example for the evolution of its species.
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name an area of the body that would have the greatest two-point threshold distance and an area that would equal the smallest distance determined. explain your reasoning for these two areas.
Receptive fields in various body regions have varying sizes, which can improve two-point discrimination resolution. The most sensitive parts of the body are the tongue, lips, and fingers since they have the highest resolution.
The least sensitive body parts are the back, calves, and forearms. The distance at which the two points may be felt to be apart is used to show two-point discrimination.
The shortest distance between two stimulation locations on the skin at which the two impulses are interpreted as two stimuli rather than as one stimulus is known as the "two-point threshold." Likewise known as spatial threshold.
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based on the following pedigree, with blood types provided (and ignoring the bombay phenotype - assume everyone is hh), what conclusions about paternity can be drawn?
The conclusions this can be the father of the daughter but not the son.
What phenotype is Bombay?
The "Bombay phenotype," named after the location where it was identified, characterizes people whose RBCs lack the H antigen. Because the A and B antigens cannot be produced in the absence of the H antigen precursor, their RBCs lack these antigens as well.
What is Bombay phenotype an example of?
The Bombay blood group is an uncommon blood group, with phenotypes missing H antigen on the red cell membrane but having anti-H in the serum. It does not have any A, B, or H antigens on its red cells or other organs. Bhende et al. were the first to discover a human H/h genetic polymorphism.
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which of the following is/are involved pathophysiology of als? group of answer choices death of upper motor neurons death of lower motor neurons loss of dopamine neurons in the substantia nigra
ALS is characterized by the progressive degeneration of motor nerve cells in the brain (upper motor neurons) and spinal cord (lower motor neurons).
ALS (amyotrophic lateral sclerosis) causes loss of muscle control. ALS is often called Lou Gehrig's disease, after the baseball player who was diagnosed with it. ALS has no cure. Causes of ALS: Theoretical mechanisms of neurodegeneration 1 Oxidative stress Defective glutamate metabolism Mitochondrial dysfunction. This neuronal death causes loss of brain volume and disruption of sodium, calcium, and potassium ion channels, which in turn alters neuronal conductance. The disorder is named for its underlying pathophysiology, and "amyotrophy" refers to the atrophy of muscle fibers, which are denervated as the corresponding anterior horn cells degenerate.
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suppose a researcher conducts an anova analysis that compares three different treatments for depression: medication, cognitive behavioral therapy, and a control condition. the p-value for the f statistic is .04. which of the following statements is true?
c. At least one pair of treatment conditions has different means. The ANOVA test is used as the first stage in examining the variables that influence a certain data set.
After the test is complete, an analyst runs additional tests on the procedural treatment elements that measurably contribute to the inconsistent nature of the data set. In order to produce more data that is consistent with the suggested regression models, the analyst uses the ANOVA test findings in an f-test.
Using the ANOVA test, you can compare more than two groups at once to see if there is a correlation between them. The F statistic, or F-ratio, which is the outcome of the ANOVA formula enables the examination of several groups of data to ascertain the variability within and across samples. The F-ratio result of the ANOVA will be relatively close to 1 if there is no discernible difference between the tested groups, which is known as the null hypothesis. The F-distribution is the distribution of each and every value that the F statistic could take. In reality, this is a collection of distribution functions, and the numerator degrees of freedom and denominator degrees of freedom are its two distinguishing characteristics.
The complete question is:
Suppose a researcher conducts an ANOVA analysis that compares three different treatments for depression: medication, cognitive behavioral therapy, and a control condition. The p-value for the F statistic is .04. Which of the following statements is true?
Select one:
a. All three pairs of groups have different means, within sampling error
b. All three groups have identical means
c. At least one pair of treatment conditions has different means
d. At least two of the three pairs of treatment conditions have different means
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by causing host cell to polymerize at one end of the bacterial cell, certain bacteria can propel themselves from the interior of one cell directly into the interior of an adjacent cell, allowing them to avoid extracellular immune response mechanisms.
By causing host cell actin to polymerize at one end of the bacterial cell, certain bacteria can propel themselves from the interior of one cell directly into the interior of an adjacent cell, allowing them to avoid extracellular immune response mechanisms.
The filaments bring together from actin monomers with a sure ATP. After polymerization, actin swiftly hydrolyzes the sure ATP and slowly dissociates the γ-phosphate. ADP-actin filaments then disassemble to recycle the subunits of low ionic energy, actin filaments depolymerize to monomers.
Actin then polymerizes spontaneously if the ionic energy is expanded to physiological levels. The first step in actin polymerization (referred to as nucleation) is the formation of a small combination inclusive of 3 actin monomers.
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what is the original source of energy in the food you eat?(1 point) responses plants plants sugar sugar photosynthesis photosynthesis sun
Through photosynthesis, certain organisms convert solar energy (sunlight) into chemical energy, which is then used to build carbohydrate molecules.
The energy used to hold these molecules together is released when an organism breaks down food. Cells then use this energy to do work, such as cellular respiration. The energy content of all food molecules can be traced back to the Sun. It is the process of photosynthesis that locks energy from the Sun into simple carbohydrates like glucose. In photosynthesis, solar energy is harvested as chemical energy in a process that converts water and carbon dioxide into glucose. Oxygen is released as a byproduct. Plants use a process called photosynthesis to make food. During photosynthesis, plants trap light energy with their leaves. Plants use the sun's energy to convert water and carbon dioxide into a sugar called glucose. Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
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there are three alleles at a specific locus in a population of humans. allele d1, d2, and d3 with frequencies 0.42, 0.30, and 0.28 respectively. true or false or cannot determine: allele d1 is dominant.
The D1 allele is the most frequent at a specific locus in a population of humans: alleles D1, D2, and D3 with frequencies of 0.42, 0.30, and 0.28 respectively.
A population's allele frequency is calculated by dividing the number of copies of the allele of interest in that population by the total number of copies of all the alleles present at that particular genetic locus.
If gametes accidentally bind together to form zygotes and all the alleles occur at the identical frequency in the sperm and egg cells, the probability that any two alleles will combine to create a certain genotype equals the product of the allele frequencies.
The complete question is:
There are three alleles at a specific locus in a population of humans: alleles D1, D2, and D3 with frequencies of 0.42, 0.30, and 0.28 respectively. What can you say confidently about the D1 allele? Check all that apply.
A. The D1 allele is the most frequent.
B. The D1 allele is advantageous.
C. The D1 allele is dominant.
D. The D1 allele is rare.
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how does the protein encoded by the ras oncogene differ from the protein encoded by the normal ras gene?
The protein encoded by the ras oncogene is unable to hydrolyze GTP where the protein encoded by the normal ras gene can hydrolyze GTP.
An oncogene is a gene that has undergone mutation and may be carcinogenic. A proto-oncogene, which controls regular cell division, is an oncogene that has not yet undergone mutation. A gene that has the capacity to cause cancer is referred to as an oncogene. These genes are frequently altered or highly expressed in tumour cells.
Being involved in the regulation of almost all cellular processes, hydrolyze GTP is a biologically significant reaction. Therefore, one of the most crucial pharmacological targets is the enzyme that catalyses this process. hydrolyze GTP is a fundamental biological activity that controls practically all cellular functions.
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Select all that apply
Secreted antibody molecules ______.
circulate freely in the lymph
circulate freely in the tissue fluids
are trapped in tissues
circulate freely in the blood
Answer: circulate freely in the lymph
circulate freely in the tissue fluids
circulate freely in the blood
Secreted antibody molecules:
Circulate freely in the lymph Circulate freely in the tissue fluids Circulate freely in the blood. About antibodyAntibody is a glycoprotein with a specific structure secreted from absorbent B-lymphocytes which have been activated to become plasma cells,as a response to certain antigen and reactive to that antigen.
The human immunity system is determined by the ability of the body to produce antibodies against antigens. Antibodies can be found in the blood or glands of the body of other vertebrates, and are used by the immune system to identify and neutralize foreign bodies such as bacteria and viruses. Antibody molecules circulate in the blood vessels and enter the body's tissues by going through a round of inflammation. They are made of little basic structures called chains. Each antibody has two heavy chains and two light chains.
There are several different types of antibody heavy chains, and several different types of antibodies, which are assigned to different classes (en:isotypes) based on each heavy chain. Five different isotypes of antibodies are known to exist in the mammalian body and play different roles and help direct the appropriate immune response for each different type of foreign body that enters the body,namely: IgG, IgM, IgA, IgD and IgE, which have a difference in area C.
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If a plant that is homozygous dominant for a gene is crossed with a plant that is homozygous recessive for the same gene, what is the probability that the offspring will have the same genotype as one of the parents? Same phenotype?
If a plant that is homozygous dominant for a gene is crossed with a plant that is homozygous recessive for the same gene, the probability that the offspring will have the same genotype as one of the parents is 0. The probability that the offspring will have the same phenotype as one of the parents is 0.25.
In genetics, a gene is a unit of heredity that is passed down from parent to offspring. Genes are made up of DNA, and they encode the instructions for making proteins that determine an organism's traits. A gene can have different versions, called alleles, that can result in different traits.
When an organism is homozygous for a gene, it means that it has two copies of the same allele for that gene.
For example, if a plant is homozygous dominant for a gene, it means that it has two copies of the dominant allele for that gene. Similarly, if a plant is homozygous recessive for a gene, it means that it has two copies of the recessive allele for that gene.
When two plants that are homozygous for different alleles of the same gene are crossed, the offspring will inherit one allele from each parent. In this case, all of the offspring will be heterozygous for the gene, meaning that they will have one copy of the dominant allele and one copy of the recessive allele.
Since none of the offspring will have the same genotype as either parent, the probability that the offspring will have the same genotype as one of the parents is 0.
The phenotype of an organism is the physical expression of its genotype, or the combination of alleles that it carries for a given gene. In this case, the plants that are homozygous dominant for the gene will have the dominant trait, while the plants that are homozygous recessive for the gene will have the recessive trait.
Since the offspring of the cross will be heterozygous for the gene, they will have the dominant trait. Therefore, the probability that the offspring will have the same phenotype as one of the parents is 0.25, or 1 in 4.
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Imagine a population evolving by genetic drift in which the frequency of the k allele is 0. 2. What is the probability that at some point in the future allele k will drift to a frequency of 1? your answer should be a one decimal place answer.
Given that genetic drift is a random and non-directional mechanism of evolution that dramatically changes the gene or allele frequency in every population, the likelihood that allele k will drift to a frequency of 1.0 in the future is 0.5.
How does genetic drift work?A mechanism of evolution known as genetic drift is when a population's allele frequencies shift over generations owing to chance (sampling error). In smaller populations, it is more efficient.
Genetic drift is a random and non-directional mechanism of evolution, hence its outcome cannot be predicted. It's possible that it modifies the frequency of other alleles while maintaining the allele k's fixed frequency of 1.0.
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Which best describes inserting a table using the Table Gallery?
A The user can click on Insert Table.
B There are many options on how to include a table.
C The user can make a quick selection of the number of rows and columns present.
D The user can click to use an Excel spreadsheet.
What is pollution?
Explain how pollution can negatively affect an ecosystem.
Use an example from your own knowledge to support your answer.
Now help me i only have 5 mins left to have this done pleeaeee
A great variety of predictions and hypotheses can be tested using the methods of science. Even so, there are some questions that do not lend themselves to scientific testing. Sort the statements as predictions or hypotheses that are scientifically testable and those that cannot be tested scientifically.
1. Taking vitamin C supplements every day will decrease the likelihood of catching a cold.
2. Strawberries taste nicer and look better when the plants are watered every other day
3. A person's soul is seperate from his or her body and the soul will continue to exist even after the person dies.
4. Meditating daily reduces the recurrence of depression in those who have had depression before.
5. Using torture to interrogate prisoners is wrong even if the information gained through torture saves lives.
6. Planting fields with several types of rice results in less disease and higher yields.
Science provides a vast field to study and research purposes. There are variety of hypotheses which can and cannot be tested by methods of science.
SCIENTIFICALLY TESTABLE:
Rice fields planted with a variety of varieties produce more rice with fewer diseases and higher yields.
Taking vitamin C supplements daily will lower your risk of getting a cold.
Daily meditation helps people who have already experienced depression avoid relapsing into it.
IS NOT TESTED SCIENTIFICALLY:
Watering strawberry plants every other day improves the taste and appearance of the fruit.
Even if it saves the rest of the family from starvation, selling a child into slavery is wrong.
A person's soul is distinct from their physical body, and it will live on even after they pass away.
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