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Question

Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybrid, the F2 segregation will show

A
Higher number of the recombinant types
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B
Segregation in the expected 9:3:3:1 ratio
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C
Segregation in 3:1 ratio
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D
Higher number of the parental types
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Solution

The correct option is D Higher number of the parental types
The closely located genes show the tendency of linkage and they are transmitted together to the next generation. If two closely located genes show linkage, they do not show cross over and result in formation of higher number of the parental types. Option D is correct.

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