Multiple Choice
In a typical diploid organism, how many daughter cells are produced from one cell after completion of meiosis (meiosis I and meiosis II)?
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9. Mitosis and Meiosis
Meiosis
Multiple Choice
During meiosis, how many times is DNA replication (S phase) carried out before the cell divisions occur?
A
Once
B
Three times (before prophase I, metaphase I, and metaphase II)
C
It does not occur during meiosis
D
Twice (once before meiosis I and once before meiosis II)
Verified step by step guidance1
Understand the phases of meiosis: Meiosis consists of one round of DNA replication followed by two rounds of cell division, called 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 prophase I.
Recognize that no additional DNA replication occurs between meiosis I and meiosis II; the cell proceeds directly into the second division.
Summarize that DNA replication happens only once, before meiosis I, ensuring that each chromosome consists of two sister chromatids before the divisions start.
Conclude that the correct answer is that DNA replication occurs once before the two meiotic divisions.
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