Topic: Cell cycle, mitosis, meiosis· Cell Structure and Function

The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G_1 phase is 8, what would be the number of chromosomes after S phase ?

1. 8

2. 16

3. 4

4. 32

Doubtly Asked 30 Oct 2026 NEET UG 2021 Practice test neet Save WhatsApp Report

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Answer: 1. 8

The chromosome number does not change in S phase; only DNA content doubles, because each chromosome gets two sister chromatids but they remain joined at the centromere and count as one chromosome.

So after S phase the fruit fly cell still has 8 chromosomes (DNA amount 2C to 4C).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G_1 phase is 8, what would be the number of chromosomes after S phase ?

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