객관식
During which phase of meiosis do homologous chromosomes pair up and crossing over occurs?
135
views
9. Mitosis and Meiosis
Meiosis
객관식
After the homologous pairs are separated during meiosis I, which of the following events occurs next?
A
DNA replication occurs again before meiosis II.
B
The cell immediately enters mitosis.
C
Homologous chromosomes pair up again for crossing over.
D
Sister chromatids are separated during meiosis II.
검증된 단계별 안내1
Recall the sequence of events in meiosis: Meiosis I involves the separation of homologous chromosome pairs, while meiosis II involves the separation of sister chromatids.
Understand that DNA replication occurs only once before meiosis begins, during the S phase of interphase, and does not happen again between meiosis I and meiosis II.
Recognize that after meiosis I, the cell does not enter mitosis; instead, it proceeds directly into meiosis II without an intervening round of DNA replication.
Note that homologous chromosomes pair up and crossing over occurs during prophase I of meiosis I, not after meiosis I is completed.
Therefore, the next key event after homologous chromosomes separate in meiosis I is the separation of sister chromatids during meiosis II.
관련 영상
관련 실천
