Question: Where do you expect genetic differences between cells to arise from mitosis or from meiosis Why?

The nuclei resulting from meiosis are never genetically identical, and they contain one chromosome set only—this is half the number of the original cell, which was diploid. The differences in the outcomes of meiosis and mitosis occur because of differences in the behavior of the chromosomes during each process.

Where do genetic differences between cells arise?

Specifically, meiosis creates new combinations of genetic material in each of the four daughter cells. These new combinations result from the exchange of DNA between paired chromosomes. Such exchange means that the gametes produced through meiosis exhibit an amazing range of genetic variation.

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Why can we expect meiosis to give rise to genetic differences between parent cells and their daughter cells in fewer generations than mitosis?

The daughter cells produced by mitosis are identical, whereas the daughter cells produced by meiosis are different because crossing over has occurred. The events that occur in meiosis but not mitosis include homologous chromosomes pairing up, crossing over, and lining up along the metaphase plate in tetrads.

Why is the differences between mitosis and meiosis?

Most of these differences relate back to the fact that, although both are needed for cell replication, mitosis and meiosis have different purposes: mitosis replaces body cells with identical copies, while meiosis creates genetically different sex cells that will be used to create an entirely new organism.

Does genetic variation occur in mitosis or meiosis?

Meiosis creates more genetic variation. This is because it produces 4 daughter cells, none of which are genetically identical, while mitosis produces 2 identical daughter cells (which are identical to the parent cell).

Where does genetic variation occur in meiosis?

During meiosis, homologous chromosomes (1 from each parent) pair along their lengths. The chromosomes cross over at points called chiasma. At each chiasma, the chromosomes break and rejoin, trading some of their genes. This recombination results in genetic variation.

Where do the maternal and paternal chromosomes come from in meiosis?

One of these chromosomes is derived from the male parent (parental chromosome) and one from the female (maternal chromosome). The chromosomes in this pair are called homologs – there is one paternal and one maternal homolog.

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How do you cells at the completion of meiosis compare with cells that are in prophase of meiosis one?

How do cells at the completion of meiosis compare with cells that have replicated their DNA and are just about to begin meiosis? They have twice the amount of cytoplasm and half the amount of DNA. They have half the number of chromosomes and half the amount of DNA.

Which event occurs during meiosis II but not during meiosis?

In meiosis II, these chromosomes are further separated into sister chromatids. Meiosis I includes crossing over or recombination of genetic material between chromosome pairs, while meiosis II does not.

Which source of genetic variation creates individual chromosomes that are a combination of maternal and paternal genes?

Crossing over produces recombinant chromosomes, individual chromosomes that carry genes (DNA) derived from two different parents.

Which process mitosis to meiosis creates genetically identical cells?

The goal of mitosis is to produce two daughter cells that are genetically identical to the parent cell. Mitosis happens when you grow.

Mitosis vs. Meiosis.

Mitosis Meiosis
Purpose To produce new cells To produce gametes
Number of Cells Produced 2 4
Rounds of Cell Division 1 2
Haploid or Diploid Diploid Haploid

Which of the following differentiates meiosis from mitosis?

Which of the following differentiates meiosis from mitosis? Mitosis is used for the repair of cells, whereas meiosis creates cells for sexual reproduction.

Which of the following distinguishes meiosis from mitosis?

Mitosis occurs in somatic cells and meiosis occurs in germ cells. The crossing over event takes place in meiotic cell division and not in mitosis. Meiosis produces four n daughter cells.

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How do mutations contribute to genetic variation?

The flow of individuals in and out of a population introduces new alleles and increases genetic variation within that population. Mutations are changes to an organism’s DNA that create diversity within a population by introducing new alleles.

How does mutation and meiosis contribute to genetic variation?

If a mutation occurs in cells that will make gametes by meiosis or during meiosis itself, it can be passed on to offspring and contribute to genetic variability of the population. Mutations are the sole source of genetic variability that can occur in asexual reproduction.

How do meiosis contributes to genetic variation while mitosis does not?

Assess how meiosis contributes to genetic variation, while mitosis does not. During meiosis, the independent assortment of the pairs of chromosomes and crossing over provide a large amount of genetic variation. Mitosis produces identical cells.