객관식
Which type of cells undergo meiosis in animals?
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9. Mitosis and Meiosis
Meiosis
객관식
During meiosis, what happens to the chromosome number of a diploid cell by the end of meiosis II?
A
It doubles, producing tetraploid cells (from to ).
B
It is reduced by half, producing haploid cells (from to ).
C
It becomes an odd number of chromosomes due to crossing over changing chromosome count.
D
It remains the same, producing diploid cells (from to ).
검증된 단계별 안내1
Understand that a diploid cell has two sets of chromosomes, represented as \$2n\(, where \)n$ is the number of unique chromosomes.
Recall that meiosis consists of two sequential divisions: meiosis I and meiosis II.
During meiosis I, homologous chromosomes are separated, which reduces the chromosome number from diploid (\$2n\() to haploid (\)n$), but each chromosome still consists of two sister chromatids.
In meiosis II, the sister chromatids are separated, but the chromosome number remains haploid (\(n\)) because the chromatids are now individual chromosomes.
Therefore, by the end of meiosis II, the chromosome number is reduced by half compared to the original diploid cell, resulting in haploid cells with chromosome number \(n\).
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