객관식
In what types of cells does meiosis occur?
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9. Mitosis and Meiosis
Meiosis
객관식
During meiosis, the chromosome number in the resulting cells does what compared with the parent cell?
A
It increases by one set of chromosomes due to crossing over.
B
It is reduced by half, producing haploid cells.
C
It stays the same, producing diploid cells identical in chromosome number to the parent cell.
D
It doubles, producing cells with twice as many chromosomes as the parent cell.
검증된 단계별 안내1
Understand the purpose of meiosis: Meiosis is a type of cell division that reduces the chromosome number by half to produce gametes (sex cells).
Recall the chromosome number in the parent cell: The parent cell is diploid (2n), meaning it has two sets of chromosomes, one from each parent.
Recognize what happens during meiosis: The process involves two rounds of division (meiosis I and meiosis II) but only one round of DNA replication, leading to a reduction in chromosome number.
Identify the chromosome number in the resulting cells: After meiosis, the cells are haploid (n), containing only one set of chromosomes, which is half the number of the original diploid cell.
Clarify the role of crossing over: Crossing over occurs during meiosis I and involves the exchange of genetic material between homologous chromosomes but does not change the chromosome number.
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