Blue eye colour is recessive to brown eye colour. A brown

Blue eye colour is recessive to brown eye colour. A brown eyed man whose mother was blue eyed marries a blue-eyed women. The children shall be

1. both blue eyed and brown eyed 1: 1
2. all brown eyed
3. all blue eyed
4. blue eyed and brown eyed 3: 1

The brown eyed man will have the genotype Bb and his wife bb. Hence Bb × bb = Bb: bb. Hence ratio is 1: 1.