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In a dihybrid cross AABB xx aabb, F2 pro...

In a dihybrid cross AABB `xx` aabb, `F_2` progeny of AABB , AABb, AaBB and AaBb occurs in the ratio of

A

`1:1:1:1`

B

`9:3:3:1`

C

`1:2:2:1`

D

`1:2:2:4`

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The correct Answer is:
D
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