In humans, brown eye color dominates over light, and the ability to control mainly the right hand over

In humans, brown eye color dominates over light, and the ability to control mainly the right hand over left-handedness. Both genes are localized in different pairs of homologous chromosomes. A blue-eyed right-handed boy married a brown-eyed right-hander. They had children: a brown-eyed left-hander and a blue-eyed right-hander. Determine the likelihood of the birth of blue-eyed children in this family, genotypes predominantly with the left hand.

A – brown eyes
a – blue eyes
B – right-handed
b – left-handed
Since genes are localized on different chromosomes, then for each pair they are inherited independently of each other.
PP g AaBb x m aaBb
kp G. p.
g w / m aB ab

AB AaBB k.p. AaBb efficiency
Av AaBb efficiency Aabb C.L.
aB aaBB g.p. aaBb g.p.
ab aaBb gp aabb g l
By phenotype: 3/8 – brown-eyed right-handers
3/8 – blue-eyed right-handers
1/8 – brown-eyed left-handers
1/8 – blue-eyed left-handers
Answer: the probability of having blue-eyed children, mainly with the left hand, is 1/8 or 12.5%.