Q.

When ppQQrr is crossed with PpQqRR then the ratio of hybrid for all the genes is:

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a

¼

b

1/8

c

1/16

d

1/32

answer is A.

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Detailed Solution

ppQQrr x PpQqRRApplying product rule:pp x PpProbability of hybrid (Pp)= 1/2 QQ x QqProbability of hybrid (Qq)=1/2 rr x RRProbability of hybrid (Rr)= 1 Therefore, ratio of hybrid for all the three genes is= ½ (Pp) x ½ (Qq) x 1(Rr)                                                                        = ¼ PpQqRr
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