Question

In human beings, a recessive X-linked mutation, g, causes green-defective color vision; the wild-type allele, G, causes normal color vision. A man and a woman (generation I), both with normal vision, have three children (generation II): a color-defective son, a daughter with normal vision, and a daughter with normal vision. In generation III , give the most likely genotypes for III-1. Assume anyone who married into the family does NOT have a history of this disorder.

Answer 1

Gen 3 XGXg XGY

Step-by-step explanation:

In human beings, a recessive X-linked mutation, g, causes green-defective color vision; the wild-type allele, G, causes normal color vision.

Gen 1 XGXg x XGY

Gen 2 XgY XGXG or XGXg

Between XgY and anyone with no history of the disorder

XgY x XGXG

Gen 3 XGXg XGY