Scelta multipla
During meiosis, in which phase does crossing over between homologous chromosomes occur?
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9. Mitosis and Meiosis
Meiosis
Scelta multipla
In meiosis II, what is the primary result of the division?
A
DNA replication to produce chromosomes with two sister chromatids
B
Separation of sister chromatids, producing haploid cells with unduplicated chromosomes
C
Separation of homologous chromosomes, producing two haploid cells with duplicated chromosomes
D
Fusion of two haploid nuclei to restore diploidy
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Recall the stages of meiosis: meiosis I and meiosis II, and understand their distinct roles in cell division.
Identify that meiosis I involves the separation of homologous chromosomes, reducing the chromosome number from diploid to haploid, but chromosomes still consist of two sister chromatids.
Recognize that meiosis II resembles a mitotic division where sister chromatids are separated, resulting in cells with chromosomes that are no longer duplicated.
Understand that DNA replication occurs before meiosis I, not during meiosis II, so no new sister chromatids are formed in meiosis II.
Conclude that the primary result of meiosis II is the separation of sister chromatids, producing haploid cells with unduplicated chromosomes.
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