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Q.

If a diploid cell has 24 chromosomes, what will be the number of tetrads during its pachytene stage ?

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a

48

b

24

c

12

d

6

answer is D.

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Detailed Solution

Two chromosomes together forms one bivalent . Number of bivalents = number of tetrads , So 2n =24 , number of bivalents or tetrads are  12 .(term bivalent is with respect to chromosome number , term tetrad is with respect to chromatid number)

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