AP BIOLOGY

CELL DIVISION

MEIOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When does a dividing cell go from diploid to haploid?
A
end of Mitosis
B
end of Meiosis I
C
end of Meiosis II
Explanation: 

Detailed explanation-1: -Meiosis I ends when the chromosomes of each homologous pair arrive at opposing poles of the cell. The microtubules disintegrate, and a new nuclear membrane forms around each haploid set of chromosomes. The chromosomes uncoil, forming chromatin again, and cytokinesis occurs, forming two non-identical daughter cells.

Detailed explanation-2: -During meiosis I, the cell is diploid because the homologous chromosomes are still located within the same cell membrane. Only after the first cytokinesis, when the daughter cells of meiosis I are fully separated, are the cells considered haploid.

Detailed explanation-3: -When do meiotic cells become haploid? Cells become haploid during meiosis I due to the splitting of homologous chromosomes. The resulting cells have only ONE copy of each chromosome.

Detailed explanation-4: -At the end of meiosis I, there are two daughter cells. Although each chromosome has two chromatids, each cell only has one of the original homologous chromosomes. This is why they are considered haploid.

There is 1 question to complete.