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Q.

How many daughter chromosomes are seen in a apical meristematic cell of onion in anaphase of mitotic M phase?

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a

8

b

16

c

20

d

32

answer is D.

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Detailed Solution

Meristematic cell of onion apical meristem is diploid and has 16 chromosomes. In anaphase each chromosome with two sister chromatids is separated as daughter chromosomes. Hence in anaphase there are 32 daughter chromosomes or the cell exhibits a temporary tetraploid condition.
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How many daughter chromosomes are seen in a apical meristematic cell of onion in anaphase of mitotic M phase?