In humans, some forms of myopia dominate normal vision, and brown eye color dominates blue. The genes of these traits are on different chromosomes. What offspring can be expected from a marriage of a short-sighted brown-eyed man with a blue-eyed woman who has normal vision? Identify all possible genotypes of parents and offspring
Given: A-myopia, a-normal vision, B-brown eyes, B-blue eyes. Characteristic inheritance is independent. Find: F1, P-?
There can be four options (depending on the genotype of the father)
P: AABB x aabb
G: AB and ab
Fl: AaBb – myopia, brown eyes.
P: AABb x aabb
G: AB, AB and AB
F1; AaBb – myopia, brown eyes; Aabb – myopia, pigeon eyes;
R; AaBB x aabb G: AB, aB and ab
F1: AaBb – myopia, brown eyes; aaBb – normal vision, brown eyes;
R: AaBb x aabb
G: AB, AB, AB, AB and AB
Fl; AaBv – myopia, brown eyes; Aabb – myopia, blue eyes; aaBb – normal vision, brown eyes, aabb – normal vision, blue eyes.