객관식
Which of the following occurs during Anaphase II of meiosis?
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12. Meiosis
Meiosis II
객관식
What happens during Anaphase II of meiosis?
A
The nuclear envelope re-forms around each set of chromosomes.
B
Homologous chromosomes are separated and move to opposite poles.
C
Sister chromatids are pulled apart to opposite poles of the cell.
D
Chromosomes line up at the equatorial plane of the cell.
검증된 단계별 안내1
Understand that meiosis is a type of cell division that reduces the chromosome number by half, resulting in four daughter cells. It consists of two stages: Meiosis I and Meiosis II.
Recall that Anaphase II is a phase in Meiosis II, which follows Meiosis I. During Meiosis I, homologous chromosomes are separated, while Meiosis II is similar to mitosis.
In Anaphase II, the key event is the separation of sister chromatids. Each chromatid, which was previously paired with its identical sister, is pulled apart by the spindle fibers.
The spindle fibers attach to the centromeres of the sister chromatids and shorten, pulling the chromatids toward opposite poles of the cell.
This separation ensures that each of the resulting daughter cells will receive an equal and complete set of chromosomes, which is crucial for maintaining genetic stability.
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