Q.

From a cross Aa BB × aa BB, which of the following genotypic ratio will be obtained in  F1 generation?

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a

1 Aa BB : 1 aa BB

b

1 Aa BB : 3 aa BB

c

3 Aa BB : 1 aa BB

d

All Aa BB

answer is A.

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Detailed Solution

From the cross between AaBB x aaBB, the gametes produced from AaBB are  AB, aB and from parent aaBB is aB, which gives AaBB and aaBB in 1:1 ratio.
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