Meiosis is a special type of cell division, which occurs only in the germ cells during the process of development and maturation to form gametes. It consists of two successive cell divisions,
Meiosis 1 : First meiotic division, that reduces the NUMBER of chromosomes i.e. the parent cell is diploid(46 Chromosomes) and the daughter cells are haploid(23 Chromosome). It also causes genetic variation in the haploid by cross linkage.Meiosis 2 : Second meiotic division (Meiosis II) starts with two haploid parent cells and ends with four haploid daughter cells. Meiosis 2 like Meiosis 1, does not reduce the NUMBER OF CHROMOSOME that means the forming 4 daughter cells are haploid and their number of chromosome remains the same as the parent. BUT Haploid cells that go into the meiosis 2 have MORE AMOUNT OF CHROMOSOME THAN USUAL, thus MEIOSIS 2 REDUCES the amount of chromosome rather than the number of chromosome.The DNA of the primitive germs cells is replicated prior to the meiosis 1 only and there is no replication of DNA before Meiosis 2. The four final cells reulting from the two meiotic divisions are not only haploid(i.e. containing 23 chromosome) but they are also containing 1n amount of DNA so that when the gametes fuse together forming a zygote, both the amount and number of chromosome and DNA remains SAME.
_____________________________________[tex]\huge{\text{Why is Meiosis Important?}}[/tex]Meiosis is essential for the sexual reproduction of eukaryotic organisms because it enables genetic diversity through recombination, and the repair of genetic defects.
It contributes in genetic reassorment which ensures the genetic diversity in the offsprings. The genetic reassortment takes place by following two mechanisms:
During the prophase of meiosis 1, crossing over of genetic material between the homologous maternal and paternal chromosomes takes place which causes exchange of DNA fragments between the chromosome resulting is genetic diversity.During the anaphase of the first meiotic division, there is random distribution of maternal and paternal homologous chromosomes among the daughter cells which are produced as a result of meiotic division._____________________________________Best Regards,'Borz'PLEASE HELP ME GUYS !
What line up during mitosis metaphase at the metaphase plate?
a) Homologous chromosomes
Ob) Sister chromatids
c) Aster
d) Microtubes
Answer:
a) During metaphase, each of the 46 chromosomes line up along the center of the cell at the metaphase plate.
when a dead animal is burried how long does it take to decompose and form bones? please answer though its awkward me asking this and be sincere ....il give you brainliest no links please
Answer:
It takes millions of years.
Explanation:
As when a dead animal is buried it should reach sedimentary rock
RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme "dicer" cuts dsRNA into smaller fragments called , which form a complex with RISC and degrade specific .
RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme “dicer” cuts dsRNA into smaller fragments called siRNA, which form a complex with RISC and degrade specific RNA.
siRNA or small interfering RNA as a part of RISC complex finds and binds to complementary mRNA and it induces the cleavage of mRNA. This causes degradation of that mRNA. This is the way RNA interference prevents translation.
Answer:
RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme "dicer" cuts dsRNA into smaller fragments called ( small interfering RNA (siRNA) ) which form a complex with RISC and degrade specific ( mRNA)
Explanation:
:)
Do plants produce more oxygen than they need?
Answer:
Photosynthesis uses carbon dioxide to make sugar and produces oxygen as a byproduct. Respiration uses oxygen to release energy from stored sugar and produces carbon dioxide as a byproduct. ... However, if the plants are growing, then over a period of 24 hours they will produce more oxygen than they consume.
Your class is participating in a population genetic simulation. You and your classmates are the predators and your prey is candy in a jar: chocolate (AA), chocolate and mint (Aa), and mint (aa). Each time you and your classmates eat one candy, your prey reproduces (more candy is added to the jar). After several generations you observe 80% of the prey remaining in the jar is chocolate (AA). What percent of your remaining prey is mint (aa) assuming that Hardy-Weinberg equilibrium is being followed
Answer:
1%
Explanation:
An easy 10 points
Make up your own scientific theory.
Answer:
Ammmmm theory focused on the structuralist or central-peripheral paradigm, the analysis of internal colonialism and marginality, and studies on dependence are discussed here. Wherever they come, the divergent key positions of the Latin American school are important.
What does coal do to the environment
Answer:
the burning of fossil fuels releases greenhouse gases into the atmosphere, increasing levels of CO2 and other gasses, trapping heat, and contributing to global climate change. Coal combustion releases the greenhouse gases carbon dioxide (CO2) and nitrous oxide (N2O) during combustion.Explanation:
Answer: Burning fuel releases CO2 into the atmosphere these gasses are called greenhouse gasses. When enough of these gasses accumulate in the sky the earth's natural temperature increases.
Which of the following best describes the relationship between the new moon phase
and constellations?
A During the new moon phase, constellations take on different shapes due to a lack
of moonlight
B During the new moon phase, constellations are on the same side of the earth as
the sun
с
During the new moon phase, constellations are easier to see due to a lack of
moonlight
D
During the new moon phase, constellations are easier to see due to increased
sunlight
Answer: c
Explanation:
when there is lack of moonlight its easy to see star light
During the new moon phase, constellations take on different shapes due to a lack of moonlight. So, the correct option is A.
What are Constellations?Constellation is define as a group of stars that appears to form a pattern or picture, such as Orion the Great Hunter, Leo the Lion, or Taurus the Bull. Constellations are recognizable patterns that help people navigate the night sky where there are 88 official constellations.
The groups of stars which make an imaginary shape in the night sky are called constellations which are usually named after mythological characters, people, animals and object they resemble in shape. During the new moon phase, constellations take on different shapes due to a lack of moonlight which describes the relationship between the new moon phase and constellations.
Therefore, the correct option is A.
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The ocean has salt water, but rivers and streams .
have _____Water .
Someone please help me ty!
WILL GIVE BRAINLIEST!!!
The spongy layer____
A.) can't do photosynthesis
B.) is the outermost layer
C.) has no chloroplasts
D.) contains stomata
Answer:
B
Explanation:
is the outermost layer
3 цуулы дфеу игешеы щл гмг фтнцфны еру зукыщт фищму ьу шы сщккусею
Which refers to the amount of energy in a sound wave per unit of time and is also related to the loudness of a sound?
Which of these benefits the grassland by allowing light, warmth, moisture, and nutrients back into the soil?
ponds
fires
rainfall
trees
Why does a precipitate form when enzymes denature?
Answer:
Explanation:
This occurs because heat increases the kinetic energy and causes the molecules to vibrate so rapidly and violently that the bonds are disrupted. The proteins in eggs denature and coagulate during cooking.
Answer:
This is what I found I am sry if this is not it I am 10 yrs
Explanation:
This occurs because heat increases the kinetic energy and causes the molecules to vibrate so rapidly and violently that the bonds are disrupted. The proteins in eggs denature and coagulate during cooking.
9. Introducing an exotic species to an environment can
a improve soil fertility.
b. cause biological magnification.
c. cause native species to die out.
d increase crop yields.
Answer:
The answer would be: C. Cause native species to die out.
Explanation:
The Everglades is a prime example of this. The python is a non-native, exotic species. It has caused over 99% of native species to die out.
Let me know if I am correct! :>
What’s the largest lake in Florida (don’t search)
Answer:
lake Okeechobee
Explanation:
i live in Florida so i know
i didnt search so dont count on me but i think its like 750 sq miles or sumn crazy like that
Which statements about waves are true? (Select TWO)
A
Light waves are mechanical waves.
B
Sound waves are mechanical waves
C
Sound waves are electromagnetic waves
D
Only mechanical waves can travel through a vacuum.
E
Only electromagnetic waves can travel through a vacuum.
F
Only electromagnetic waves can transport energy.
Answer:
the anser is b and f
Explanation:
etc
what are some functions of sensory protein?
Answer:
Explanation:
These proteins, known as growth factors, are signals that stimulate cellular functions such as growth, proliferation, healing and differentiation. In the developing human spinal cord, BMPs are required for the formation of neurons.
Helppppppppppppppppppp! ILL GIVE BRAINLIEST!!!!!
The graph below shows four different traits and the extent to which each trait is shared among different types of siblings raised in the same environment. In the graph, identical twins are siblings who share the same mother and father and are genetically identical, biological siblings are siblings who share the same mother and father but are genetically unique, and adoptive siblings are siblings who do not share the same mother and father.
Based on the information in the graph, which trait has the strongest genetic component?
A. Trait 1
B. Trait 2
C. Trait 3
D. Trait 4
Answer:
trait 1
Explanthis was counfusing so i might get this rong
Answer:
We will need more info please!
Explanation:
I will help you but ill need the graph!
14. Scientists have found fossils of tropical plants in Antarctica. How could tropical plants
have grown in Antarctica?
a.At one time , earths entire surface was a tropical forest
b.At one time , Antarctica was located closer to the equator
c.Catastrophic volcanic eruptions melted the ice and exposed the soil to sunlight
list the 6 main functions of sugar in food preparation and give a brief description of how it is used in this capacity
Answer:
Although the main reason for the use of sugar is its sweet taste, sugar has many other functions in food technology. The most important among these are that added sugar in foods acts as a sweetener, preservative, texture modifier, fermentation substrate, flavouring and colouring agent, bulking agent.
Explanation: i dont think this the main... but hope it helps :)
A group of scientists are studying the genome of the Drosophila Fly. In these flies, the allele for long wings is dominant over the allele for short wings. What phenotype would a heterozygous genotype have?
Answer:
Long wings dominant = LL
Short wings recessive = ss
Heterozygous= Ls
Explanation:
That what I was able to get with the information provided hope it helps.
Photophores help the animals which zone of the ocean? How do they help?
Question 6 options:
coasts - tentacles to attach to rocks
frozen ocean areas - help blood from freezing
deep sea areas - attract prey with light
coral reef areas - calcification for skeletal protection
Answer:
Deep Sea Areas
Explanation:
Photophores are animals that produce light.
Photophores help the animals in deep sea areas—attract prey with light of the ocean. Therefore, the correct option is C.
What are photophores?Deep sea animals live in complete darkness where no sunlight can penetrate. In order to find food or mates, many of these animals have evolved special light-producing organs called photophores. These organs emit light, which can be used to attract prey or to communicate with other members of the same species.
The light produced by photophores can vary in color, brightness, and pattern depending on the species. Some animals use their photophores to create a dazzling display that confuses or disorients their predators, while others use them to mimic the appearance of other animals or objects in their environment. Therefore, the correct option is C.
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The question is incomplete, but most probably the complete question is,
Photophores help the animals, which zone of the ocean? How do they help?
A. coasts—tentacles to attach to rocks
B. frozen ocean areas—help blood from freezing
C. deep sea areas—attract prey with light
D. coral reef areas—calcification for skeletal protection
What would happen to one of the organisms involved in a
symbiosis if the other organism is no longer present?
Answer:
Commensalism is a symbiotic relationship in which one species benefits while the other is not affected.
Explanation:
The organism of the ecosystem like the plants and the animals along with the microorganisms are connected and interlinked with one another through the ecological relationship. The relation could be positive, negative or neutral.
What is symbiotic relation?Symbiosis is an ecological relationship in which the organisms lives together and they both or a single organism is benefitted from the other.A symbiotic relationship in the ecosystem can be positive, neutral or negative and is of various types like commensalism, competition and parasitism.If the organism is removed from the symbiotic relationship then the factors like the shelter, food, locomotion etc. of the other organism can be affected adversely.Thus, symbiosis is important for the ecosystem.
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Which of the following statements is true with regard to the role of plants in the field of biotechnology?
WILL GIVE BRAINLIEST. PLEASE HELP!!!
The lightest part of a shadow is called the
asteroid
penumbra
umbra
eclipse
Your answer is umbra......
Answer:
The lightest part of a shadow is called the penumbra however the darkest part is called the umbra
Explanation:
hope this helps
Environmental impact that have led to gray wolfs adaptation
Answer:
what are you asking?
Explanation:
What can the reader conclude about ecosystems based on the information in this passage?Ecosystems Ecosystems are are always always distinctly distinctly different different and and unique.unique.Ecosystems Ecosystems are are interrelated interrelated with with other other ecosystems ecosystems surrounding surrounding or or including including them.them.Ecosystems Ecosystems are are slow-slow-developing developing entities entities of of biological biological communitiesmunities.Ecosystems Ecosystems are are clusters clusters of of communal communal habitats habitats in in an an area.area.
um what are the anwsers for the question
What process creates the biological molecule that composes the other three biological molecules in the chart?
A. Replication
B. Protein synthesis
C. Photosynthesis
D. Cell respiration
Please help me, I really need help with this.