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Two linked genes a and b show 20% recomb...

Two linked genes a and b show 20% recombination. The individuals of a dihybrid cross between `++//++ xx ab//ab` shall show gametes

A

`+ + 80 : ab : 20`

B

`+ + 50 : ab : 50`

C

`+ +40 : ab 40 : a 10 : + b 10`

D

`+ +30 : ab 30 : a 20 : + b 20`

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The correct Answer is:
C
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