Question

Blue eye colour in human is recessive to brown eye colour. The expected children of a marriage between a blue eyed woman and a brown eyed man who had a blue eyed mother will be?

• A. All black eyed
• B. All blue eyed
• C. All brown eyed
• D. One blue eyed and one brown eyed

Answer 1

The correct option is D One blue eyed and one brown eyed

As Blue eye colour in human is recessive to brown eye colour, a woman with blue eyes must be a homozygous recessive individual and a man with brown eyes who had a blue-eyed mother would be a heterozygous individual. Denoting the dominant allele as B and recessive allele as b, the cross between the blue-eyed woman and the brown-eyed son of a blue-eyed mother would produce half the offspring with blue eyes and half with brown eyes.

So, the correct answer is 'One blue eyed and one brown eyed'.