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Significance of Crossing Over

AB genes are ...

Question

AB genes are linked. What is genotype of the progeny in a cross between AB/ab and ab/ab.

A

AABB and aabb

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B

AaBb and aabb

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C

AAbb and aaBB

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D

AaBb and AaBb

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Solution

The correct option is B AaBb and aabb
Linked genes occur on the same chromosome and do not separate during inheritance (complete linkage).

So, the correct answer is 'AaBb and aabb'.

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