Question

the unlettered circle at the top of the figure above shows a diploid nucleus with four chromosomes that have not yet replicated. there are two pairs of homologous chromosomes, one long and the other short. one haploid set is black, and the other is gray. the circles labeled a - e show various combinations of these chromosomes. which image displays the chromosomal composition of one daughter nucleus at telophase of mitosis?

Explanation:

Mitosis results in daughter cells that are genetically identical to the parent cell. The parent cell is diploid with two pairs of homologous chromosomes (one long, one short; one black, one gray set).

• Option A: Shows only two chromosomes (haploid), which is incorrect as mitosis in a diploid cell should result in diploid daughter cells.
• Option B: Shows replicated chromosomes (with sister chromatids), but telophase of mitosis has de - condensed chromosomes (not in replicated form with visible sister chromatids).
• Option C: Incorrect chromosome number and configuration.
• Option D: Shows replicated chromosomes (with sister chromatids), which is not the case in telophase (chromatids have separated).
• Option E: Has the correct diploid number (two pairs of chromosomes - one long and one short, with both black and gray sets representing the two homologous sets), which is consistent with the chromosomal composition of a daughter nucleus at telophase of mitosis.

Answer:

E