NEET Biology question
There are 7 chromosomes in each cell and 2C DNA after M-phase in a plant. Find out the correct match in the following table.
| State | Chromosome number | DNA content | |---|---|---| | A. G₁ | 7 | 2C | | B. S | 14 | 4C | | C. G₂ | 7 | 4C | | D. M-phase (daughter cell) | 7 | 2C |
Answer: (C)
Solution
Row A (G₁: 7 chromosomes, 2C DNA) is correct — this is the baseline unreplicated state. Row C (G₂: 7 chromosomes, 4C DNA) is correct — DNA has doubled after S-phase, but chromosome number is unchanged. Row D (post-M-phase daughter cell: 7 chromosomes, 2C DNA) is correct — mitosis restores the 2C level by
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