A cell has 40 chromosomes during the G1 phase. How many sister chromatids does that cell have during prophase I of meiosis?*1 point40108020
Question
A cell has 40 chromosomes during the G1 phase. How many sister chromatids does that cell have during prophase I of meiosis?
1 point
- 40
- 108
- 20
- 80
Solution
During the G1 phase of the cell cycle, a cell has 40 chromosomes. Each chromosome is a single chromatid.
When the cell enters the S phase (Synthesis phase), each chromosome is replicated to form two identical sister chromatids. So, after the S phase, the cell still has 40 chromosomes, but each chromosome now consists of two sister chromatids. Therefore, the cell has 80 sister chromatids.
During Prophase I of meiosis, the cell still has the same number of sister chromatids, because this is before they are separated. So, the cell has 80 sister chromatids during Prophase I of meiosis.
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