Based on the karyotype above, which of the following best describes the production of gametes in human females? At the end of the synthesis phase, the cells will have 92 individual chromosomes. During metaphase II of meiosis, each cell will have 23 individual chromosomes each composed of 2 chromatids. By the end of cellular division by mitosis, each gamete will have 23 pairs of homologous chromosomes. The last step of meiosis is cytokinesis, which will result in four gamete cells each having 46 individual chromosomes.

Question

25-05-2020
Biology

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Based on the karyotype above, which of the following best describes the production of gametes in human females? At the end of the synthesis phase, the cells will have 92 individual chromosomes. During metaphase II of meiosis, each cell will have 23 individual chromosomes each composed of 2 chromatids. By the end of cellular division by mitosis, each gamete will have 23 pairs of homologous chromosomes. The last step of meiosis is cytokinesis, which will result in four gamete cells each having 46 individual chromosomes.

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samueladesida43 samueladesida43 · Answer 1 · 2020-05-31T02:26:44+02:00

Answer:

There is no image of the Karyotype but the question will be answered based on a general knowledge of gamete formation (meiosis) in human females.

Based on this, the answer is: During metaphase II of meiosis, each cell will have 23 individual chromosomes each composed of 2 chromatids

Explanation:

Meiosis is the cellular division process employed by sexually-reproducing organisms to produce gametes. It involves the production of daughter cells (gametes) that have a reduced number of chromosomes (half) as the parent cell. Since meiosis reduces the chromosomal number, it occurs in two division steps: meiosis I and II.

Meiosis I involves the separation of homologous chromosomes (similar but non-identical chromosomes received from each parent) into opposite poles of the cell. This is where the reduction takes place. Humans contain 46 chromosomes or 23 pairs of chromosomes in their somatic cells. At the end of meiosis 1, each daughter cell will contain 23 chromosomes each.

In Metaphase of meiosis II as stated in the question, each cell will contain 23 individual chromosomes. Each chromosome being a sister chromatids i.e. 2 CHROMATIDS. The sister chromatids are to be separated in the Anaphase stage of meiosis II.