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Question

Case: Purebred shorthorn cattle of white coat (WW) were crossed with purebred cattle of red coat (RR). The F1 cattle had coats with patches of white and red side by side.
What will be the genotypic ratis of F2 generation?

A
1 : 1 : 2
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B
1 : 2 : 1
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C
2 : 1 : 1
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D
9 : 3 : 3 : 1
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Solution

The correct option is B 1 : 2 : 1
The F2 generation is obtained by crossing the F1 hybrids.

The F2 generation will have 1 white, 2 roan and 1 red coat offsprings, with the genotypes WW (1), RW (2) and RR (1). Hence, the genotypic ratio is 1 : 2 : 1.


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