In man brown eyes (B) are dominant over blue eyes (b) A blue eyed man marries a brown eyed woman whose mother had blue eyes. What proportion of children are expected to have blue eyes ?

100%

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75%

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50%

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25%

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Solution

The correct option is D 50%
Heterozygous - A diploid organism is heterozygous at a gene locus when its cells contain two different alleles (one wild-type allele and one mutant allele) of a gene. In this question, the heterozygous female is crossed with a recessive male, so from the Punnett square, we can decipher that out of all the offsprings only 50% will have blue eyes.

So the correct option is '50%'.

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