Multiple Choice
During meiosis, how many times must a germ cell undergo cell division to produce four gametes?
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9. Mitosis and Meiosis
Meiosis
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During which stage of meiosis does the chromosome number in human cells reduce from 46 chromosomes to 23 chromosomes?
A
Telophase II
B
Metaphase II
C
Prophase I
D
Anaphase I
Verified step by step guidance1
Recall that meiosis consists of two successive divisions: meiosis I and meiosis II, each with distinct stages.
Understand that the reduction in chromosome number (from diploid to haploid) occurs during meiosis I, because homologous chromosomes are separated.
Identify that during Anaphase I, homologous chromosome pairs are pulled apart to opposite poles, effectively halving the chromosome number in each daughter cell.
Note that in Anaphase II, sister chromatids separate, but the chromosome number remains the same as after meiosis I.
Conclude that the chromosome number reduces from 46 to 23 during Anaphase I, as this is when homologous chromosomes separate.
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