In humans, brown eyes dominate over blue, and the ability to better control the right hand over left-handedness.

In humans, brown eyes dominate over blue, and the ability to better control the right hand over left-handedness. A blue-eyed right-hander, heterozygous for the 2nd trait, married a core-eyed left-hander, heterozygous for the first trait. What kind of children can you expect from this marriage?

Given:
A – brown color;
a – blue;
B – right-handedness;
b – left-handedness.
Decision:
P aaBb x Aabb
Alleles of parental genotypes: aaBb (aB, ab); Aabb (Ab, ab).
F1
aB ab
Ab AaBb Aabb
ab aaBb aabb

1AaBb: 1Aab: 1aaBb: 1aabb
Such children can be expected from this marriage:
25% – brown-eyed, better command of the right hand;
25% – brown-eyed, left-handed;
25% – blue-eyed, right-handed;
25% – blue-eyed, better left hand.