Multiple Choice
During meiosis, what happens to the chromosome number from the original diploid germ cell to the resulting gametes?
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9. Mitosis and Meiosis
Meiosis
Multiple Choice
During meiosis, how many successive nuclear divisions occur to produce haploid cells from a diploid parent cell?
A
Four divisions (two rounds of mitosis)
B
One division (a single meiosis division)
C
Three divisions (meiosis I, II, and III)
D
Two divisions (meiosis I and meiosis II)
Verified step by step guidance1
Understand that meiosis is a special type of cell division that reduces the chromosome number by half, producing haploid cells from a diploid parent cell.
Recall that meiosis consists of two successive nuclear divisions: meiosis I and meiosis II, each with distinct roles in chromosome separation.
In meiosis I, homologous chromosomes are separated, reducing the chromosome number from diploid (2n) to haploid (n), but each chromosome still consists of two sister chromatids.
In meiosis II, the sister chromatids are separated, similar to mitosis, resulting in four haploid cells with single chromatids.
Therefore, the total number of successive nuclear divisions during meiosis is two, which are meiosis I and meiosis II.
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