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Q.

In an onion root tip cell, there are 24 chromosomes.  How many chromosomes will be present in the meristematic cells of onion

(A) In G1 phase 
(B) After S phase 
(C) During metaphase 

 (A)(B)(C)
1.242424
2.242448
3.122448
4.244812

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a

2

b

1

c

3

d

4

answer is A.

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Detailed Solution

In an onion root tip cell, there are 24 chromosomes.  The number of chromosomes does not change in the G1 phase, S phase and metaphase stage. Therefore, the number of chromosomes in each of these phases will be 24.

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