Multiple Choice
During meiosis, how many times is DNA replication (S phase) carried out before the cell divisions occur?
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9. Mitosis and Meiosis
Meiosis
Multiple Choice
In meiosis I, what is the primary result of the division?
A
Two diploid cells are produced, each genetically identical to the parent cell.
B
One haploid cell is produced after separation of sister chromatids during anaphase.
C
Two haploid cells are produced, each with duplicated chromosomes (sister chromatids still joined).
D
Four haploid cells are produced, each with unduplicated chromosomes (sister chromatids separated).
Verified step by step guidance1
Recall that meiosis I is the first division in meiosis, which reduces the chromosome number by half.
Understand that during meiosis I, homologous chromosomes (each consisting of two sister chromatids) are separated into different cells.
Recognize that the cells produced at the end of meiosis I are haploid because they contain one set of chromosomes, but each chromosome is still duplicated (sister chromatids remain joined).
Note that sister chromatids do not separate during meiosis I; this separation occurs later in meiosis II.
Therefore, the primary result of meiosis I is the production of two haploid cells, each with duplicated chromosomes (sister chromatids still joined).
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