객관식
What does the G2 checkpoint in the cell cycle primarily check for?
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3. Energy & Cell Processes
Introduction to Cell Division
객관식
During meiosis, how many chromosomes are present in a human cell at the end of meiosis I?
A
46 chromosomes
B
23 chromosomes
C
12 chromosomes
D
92 chromosomes
검증된 단계별 안내1
Understand that meiosis is a type of cell division that reduces the chromosome number by half, resulting in four daughter cells, each with half the number of chromosomes of the parent cell.
Recall that human cells are diploid, meaning they have two sets of chromosomes, totaling 46 chromosomes (23 pairs).
During meiosis I, homologous chromosomes are separated into two different cells. This is the reductional division where the chromosome number is halved.
At the end of meiosis I, each daughter cell contains one set of chromosomes, which means they are haploid. However, each chromosome still consists of two sister chromatids.
Therefore, at the end of meiosis I, each human cell contains 23 chromosomes, each with two sister chromatids, maintaining the total number of chromatids at 46.
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