Multiple Choice
In the process of meiosis, how many times does interphase occur before the two meiotic divisions begin?
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9. Mitosis and Meiosis
Meiosis
Multiple Choice
During meiosis, how many times does DNA replication occur before the cell divisions?
A
Once before each of the four haploid cells is formed
B
DNA replication occurs continuously throughout meiosis
C
Twice, once before meiosis I and once before meiosis II
D
Once, during interphase (S phase) before meiosis I
Verified step by step guidance1
Understand the stages of meiosis: meiosis consists of one round of DNA replication followed by two rounds of cell division, meiosis I and meiosis II.
Recall that DNA replication occurs during the S phase of the cell cycle, which happens before meiosis begins, specifically before meiosis I.
Recognize that no additional DNA replication occurs between meiosis I and meiosis II; the cell proceeds directly into the second division.
Therefore, DNA is replicated only once, during interphase (S phase) before meiosis I starts.
This single replication ensures that each chromosome consists of two sister chromatids, which are then separated during the two meiotic divisions to form four haploid cells.
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