A man homozygous for brown eye colour marries | vedclass

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Question

(A) Let the allele for brown eye colour be $B$ and the allele for blue eye colour be $b$. Since brown is dominant,$B$ is dominant over $b$.The man is

Vedclass · Accepted Answer

All brown

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(A) Let the allele for brown eye colour be $B$ and the allele for blue eye colour be $b$. Since brown is dominant,$B$ is dominant over $b$.The man is homozygous for brown eye colour,so his genotype is $BB$.The lady is heterozygous for brown eye colour,so her genotype is $Bb$.Cross: $BB 	imes Bb$Gametes produced by the man: $B, B$Gametes produced by the lady: $B, b$Offspring genotypes: $BB, Bb, BB, Bb$.All offspring will have at least one dominant allele $B$,meaning all children will have brown eyes.Therefore,the correct option is $A$.

$A$ man homozygous for brown eye colour marries a lady heterozygous for brown eye colour. Brown eye colour is dominant over blue. What will be the phenotype of their children?

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