Multiple Choice
During which phase of meiosis does crossing over (homologous recombination) occur?
28
views
9. Mitosis and Meiosis
Meiosis
Multiple Choice
In germline cells undergoing meiosis, during which stage does DNA replication occur?
A
Between meiosis I and meiosis II (interkinesis)
B
During anaphase II, as sister chromatids separate
C
During the S phase of interphase before meiosis I
D
During prophase I, as homologous chromosomes begin synapsis
Verified step by step guidance1
Recall the overall process of meiosis, which consists of two consecutive divisions: meiosis I and meiosis II, preceded by an interphase.
Understand that DNA replication occurs during the S phase of interphase, which happens before meiosis I begins, ensuring that each chromosome consists of two sister chromatids.
Recognize that no DNA replication occurs between meiosis I and meiosis II (the interkinesis phase), as the cell prepares to separate sister chromatids without duplicating DNA again.
Note that during anaphase II, sister chromatids separate, but this is a stage of chromosome segregation, not DNA replication.
Conclude that DNA replication specifically occurs during the S phase of interphase before meiosis I, setting the stage for the subsequent meiotic divisions.
Related Videos
Related Practice
