Q.

In Pisum sativum, the flower position may be axial (allele A) or terminal (allele a). What would be the percentage of the offspring with respect to axial flower position, if a cross is made between parents Aa × aa?

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a

25%

b

50%

c

75%

d

100%

answer is B.

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Detailed Solution

Aa X aa
Gametes: A, a X a a
 

 Aa
aAaaa
aAaaa

In F1 generation, 50% has axial flower and 50% has terminal flower.

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In Pisum sativum, the flower position may be axial (allele A) or terminal (allele a). What would be the percentage of the offspring with respect to axial flower position, if a cross is made between parents Aa × aa?