Question

what happens during telophase?
a. chromosomes condense into chromatin.
b. spindle fibers pull chromatids to opposite poles.
c. new nuclear envelopes form around each set of chromosomes
d. chromosomes align in the center of the cell

how does aneuploidy arise from mitosis failure?
a. through the uncontrolled division of cytoplasm
b. by an unequal distribution of chromosomes between daughter cells
c. by the formation of extra centrosomes
d. through the overproduction of spindle fibers

Explanation:

• For the first question:
• In telophase, which is the final stage of mitosis, new nuclear envelopes form around each set of chromosomes. Chromosomes condense into chromatin in prophase. Spindle fibers pull chromatids to opposite poles in anaphase. Chromosomes align in the center of the cell in metaphase.
• For the second question:
• Aneuploidy is an abnormal number of chromosomes in a cell. It arises from mitosis failure by an unequal distribution of chromosomes between daughter cells. Uncontrolled division of cytoplasm leads to multinucleated cells (not aneuploidy). Formation of extra centrosomes or overproduction of spindle fibers does not directly cause aneuploidy in the context of mitosis failure as described in basic cell - division concepts.

Answer:

• First question: C. New nuclear envelopes form around each set of chromosomes
• Second question: B. By an unequal distribution of chromosomes between daughter cells