In humans, the gene for brown eyes dominates over the gene for blue eyes, and right-handedness over left-handedness.

In humans, the gene for brown eyes dominates over the gene for blue eyes, and right-handedness over left-handedness. Genes are not linked. What kind of children will be? The father is left-handed but heterozygous for eye color, and the mother is blue-eyed but heterozygous for hand control.

1.A – brown eye color (k)
a – blue eye color (g)
2.B – dominant right hand (p)
b – dominant left hand (l)
Decision:
R: aaBb (woman) x Aabb (man)
Woman’s gametes: aB; ab
Male gametes: Ab; ab
To find out what kind of children will be, it is necessary to combine each mother’s gamete with all the father’s gametes in order. For example, we take the first mother’s gamete aB and substitute for each father’s gamete first to Ab, then to ab. Then we take the next gamete of the woman and also substitute it for the gametes of the man.
F1: AaBb (cp); aaBb (cp); Aabb (c. L); aabb (g. L);
In the first generation F1, 4 children can be born. Of these, one child will be brown-eyed and right-handed, one will have blue eyes and a dominant right hand, one will be brown-eyed left-handed and one blue-eyed left-handed.