Biology · Reproduction
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When a female ovulates, in which phase of the division is the oocyte?
- A
Anaphase I
- B
Prophase I
- C
Metaphase I
- D
Metaphase II
After ovulation, the oocyte is arrested in metaphase of meiosis II until fertilization.
During anaphase I, the homologous chromosomes are separated and move to opposite poles of the cell. This does not occur during ovulation, so this is not the correct answer.
During prophase I, the chromosomes condense and the nuclear envelope breaks down. This does occur during ovulation, but it is only the first stage of meiosis. The oocyte is in metaphase II of meiosis during ovulation, so this is not the correct answer.
During metaphase I, the chromosomes line up along the middle of the cell. This does occur during ovulation, but it is only the second stage of meiosis. The oocyte is in metaphase II of meiosis during ovulation, so this is not the correct answer.
After ovulation, the oocyte is arrested in metaphase of meiosis II until fertilization.
Tagged under Biology · Reproduction · 2021