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Codominance

When homozygo...

Question

When homozygous red coat coloured and white coat coloured cattle were crossed, all the $F_{1}$ progeny were of roan coat colour. By selfing of $F_{1}$ Red, Roan, and White coat colour cattle are obtained in the ratio

A

1:2:1

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B

1:1:2

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C

1:0:1

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D

2:1:1

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Solution

The correct option is A 1:2:1
The ratio of Red : Roan: White coat colour are 1:2:1 because of codominance. Heterozygous individuals (RW) show roan coat colour as both the alleles express themselves equally.

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