Question

Blue eye colour in human is recessive to brown eye colour. The expected children of a marriage between blue-eyed woman and brown-eyed male who had a blue-eyed mother are likely to be

• A. All blue-eyed
• B. Three blue-eyed and one brown-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

	B	b
b	Bb (brown)	bb (blue)
b	Bb (brown)	bb (blue)

Brown eyed: B

Blue-eyed: b

Blue-eyed mother of male will have genotype as bb.

Since male is brown eyed so his genotype will be: Bb

Blue eyed woman with whom he is married: bb

Cross between them: Bb * bb produces children with blue-eyed and brown-eyed in the ratio: 1: 1

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