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The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G1 phase is 8. What would be the number of chromosomes after the S phase?
- a)8
- b)16
- c)4
- d)32
Correct answer is option 'A'. Can you explain this answer?
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The fruit fly has 8 chromosomes (2n) in each cell. During interphase o...
Explanation:
The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis, the number of chromosomes at G1 phase is 8.
During the S phase of interphase, DNA replication occurs. This means that each chromosome is duplicated, resulting in two identical sister chromatids held together by a centromere.
Therefore, after the S phase, the number of chromosomes remains the same, but the number of chromatids doubles. In other words, there are still 8 chromosomes, but now there are 16 chromatids (2 chromatids per chromosome).
Summary:
- The fruit fly has 8 chromosomes (2n) in each cell.
- During interphase of Mitosis, the number of chromosomes at G1 phase is 8.
- During the S phase, DNA replication occurs and each chromosome is duplicated.
- After the S phase, the number of chromosomes remains the same (8), but the number of chromatids doubles (16).
- Therefore, the correct answer is option 'A' - 8 chromosomes.
The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis, the number of chromosomes at G1 phase is 8.
During the S phase of interphase, DNA replication occurs. This means that each chromosome is duplicated, resulting in two identical sister chromatids held together by a centromere.
Therefore, after the S phase, the number of chromosomes remains the same, but the number of chromatids doubles. In other words, there are still 8 chromosomes, but now there are 16 chromatids (2 chromatids per chromosome).
Summary:
- The fruit fly has 8 chromosomes (2n) in each cell.
- During interphase of Mitosis, the number of chromosomes at G1 phase is 8.
- During the S phase, DNA replication occurs and each chromosome is duplicated.
- After the S phase, the number of chromosomes remains the same (8), but the number of chromatids doubles (16).
- Therefore, the correct answer is option 'A' - 8 chromosomes.
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Community Answer
The fruit fly has 8 chromosomes (2n) in each cell. During interphase o...
The number of chromosomes remains same after S-phase, but the amount of DNA becomes double.
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The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G1 phase is 8. What would be the number of chromosomes after the S phase?a)8b)16c)4d)32Correct answer is option 'A'. Can you explain this answer?
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