Multiple Choice
During which phase of meiosis are sister chromatids separated?
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9. Mitosis and Meiosis
Meiosis
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During anaphase II of meiosis in a human cell, how many chromosomes are present at each pole of the cell?
A
92 chromosomes
B
46 chromosomes
C
12 chromosomes
D
23 chromosomes
Verified step by step guidance1
Recall that human somatic cells have 46 chromosomes (23 pairs) in the diploid state before meiosis begins.
Understand that meiosis consists of two divisions: meiosis I and meiosis II. After meiosis I, the cell is haploid but each chromosome still consists of two sister chromatids.
During anaphase II, the sister chromatids separate and move to opposite poles of the cell, effectively becoming individual chromosomes.
Since the cell is haploid at this stage, it contains 23 chromosomes, and after the chromatids separate, each pole will have 23 chromosomes.
Therefore, the number of chromosomes at each pole during anaphase II is 23, reflecting the haploid chromosome number.
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