Scelta multipla
During which stage of meiosis does the diploid parent cell become four separate haploid cells?
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12. Meiosis
Introduction to Meiosis
Scelta multipla
What occurs during prophase I of meiosis?
A
Chromosomes line up at the equatorial plate.
B
The nuclear envelope reforms around separated chromosomes.
C
Sister chromatids separate and move to opposite poles.
D
Homologous chromosomes pair and exchange segments.
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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.
Recognize that prophase I is the first stage of meiosis I, where several key events occur to prepare the cell for division.
During prophase I, homologous chromosomes, which are pairs of chromosomes containing the same genes but possibly different alleles, come together in a process called synapsis.
Once paired, these homologous chromosomes undergo a process called crossing over, where they exchange genetic material. This exchange of segments increases genetic diversity.
Note that the other options provided (chromosomes lining up at the equatorial plate, nuclear envelope reforming, and sister chromatids separating) occur in different stages of meiosis or mitosis, not during prophase I.
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