Brown dominates over blue eyes, right-handedness over left-handedness. A heterozygous blue-eyed right-hander

Brown dominates over blue eyes, right-handedness over left-handedness. A heterozygous blue-eyed right-hander married a diheterozygous brown-eyed right-hander. Write the genotypes of the parents. Arrange genes on chromosomes (inherited independently). Write gametes. Determine the genotypes and phenotypes of children from such a marriage?

The recessive trait appears only in the homozygous state.

Let A – brown eyes, then a – blue; B – right-handed, b – left-handed.

PP f AaBb (g, (k, n) x m aaBb (g, n)

g f – AB, Ab, aB, ab m – aB, ab

F AaBB (k, n), AaBb (k, n), aaBB (g, n), aaBb (z, n);

AaBb (k, n), Aabb (k, l), aaBb (z, n), aabbb (z, l)

Thus, in this family, the probability of having children is as follows:

– brown-eyed right-handers – 3/8 (37.5%);

– brown-eyed left-handers – 1/8 (12.5%);

– blue-eyed right-handers -3/8 (37.5%);

– blue-eyed left-handers – 1/8 (12.5%).