The roan coat color in cattle is an example of codominance. This means both alleles are clearly expressed.

If a white cow is crossed with a red cow, the offspring will have a coat made of both red and white hairs.

1. If two roan cattle were crossed, what percent of the offspring would you expect to have a roan coat?

Question

Biology

Katherine Lee

9 June, 07:44

The roan coat color in cattle is an example of codominance. This means both alleles are clearly expressed.

If a white cow is crossed with a red cow, the offspring will have a coat made of both red and white hairs.

1. If two roan cattle were crossed, what percent of the offspring would you expect to have a roan coat?

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Answers (1)

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King Lowery · Answer 1

50 % of the offspring are expected to have roan coat If two roan cattle were crossed.

Explanation:

In codominance both alleles from the parents are expressed and the phenotype is different from the parents.

Roan is a type of coat colour where there is even occurrence of coloured and white hairs on the coat of the cattle.

The genotype of Roan cattle is CRCW (CR red, CW-white)

If two roan cattles are mated:

CRCW X CRCW

punnet square shows:

CR CW

CR CRCR CWCR the genotype ratio = 1:2:1

CW CWCR CWCW phenotype ratio = 1:2:1

1 pure white cattle

1 pure red cattle

2 roan cattle