In humans, brown eye color dominates over blue. And the ability to master the right hand is better than the left.

In humans, brown eye color dominates over blue. And the ability to master the right hand is better than the left. The genes for both traits are on different chromosomes. Karoooky right-handed married a woman who had blue eyes and was left-handed. In such a family, if a person is homozygous for both traits, descendants should be expected: a) all brown-eyed right-handers; b) 50% brown-eyed right-handers, 50% blue-eyed left-handers; c) 25% brown-eyed right-handers, 25% blue-eyed left-handers; d) all brown-eyed, but 50% right-handed and 50% left-handed; e) there is no correct answer

Let’s designate the gene responsible for the brown eye color by the letter “A”, then the gene for blue eyes will be “a”. Let’s designate the gene for right-handedness as “B”, then the gene that causes left-handedness will be “b”.

The man, according to the statement of the problem, is a brown-eyed right-hander and he is homozygous – AABB. Spermatozoa produced by it – AB.

Woman, blue-eyed left-hander – aavv, her eggs – ab.

All children who can be born to this couple will be AaBb, which corresponds to brown-eyed right-handers.

Correct answer: a) all brown-eyed right-handers.