객관식
During which meiotic division do sister chromatids separate?
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9. Mitosis and Meiosis
Meiosis
객관식
In eukaryotic organisms, what is the final result of meiosis starting from one diploid germ cell?
A
Four genetically identical diploid daughter cells produced after two rounds of DNA replication
B
Four genetically distinct haploid cells (gametes or spores), each with half the original chromosome number
C
Two genetically identical diploid daughter cells with the same chromosome number as the parent cell
D
Two genetically distinct haploid cells produced after a single division without recombination
검증된 단계별 안내1
Step 1: Understand the starting point of meiosis, which is a diploid germ cell containing two sets of chromosomes (2n).
Step 2: Recognize that meiosis consists of two consecutive divisions: meiosis I and meiosis II, but only one round of DNA replication occurs before meiosis I.
Step 3: During meiosis I, homologous chromosomes separate, reducing the chromosome number by half, resulting in two haploid cells (n), each with genetically distinct chromosomes due to recombination and independent assortment.
Step 4: In meiosis II, the sister chromatids of each chromosome separate, similar to mitosis, producing four haploid cells in total.
Step 5: Conclude that the final result of meiosis is four genetically distinct haploid cells (gametes or spores), each containing half the chromosome number of the original diploid germ cell.
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