Biology question?

Question

A colorblind boy, who has parents with normal color vision, inherited his condition from ________________________.

Answer 1

A colorblind boy, who has parents with normal color vision, inherited his condition from his mother. The allele for colorblindness is carried on the X chromosome; boys only have 1 X chromosome, which they get from their mother (the father gives them the Y chromosome).

Answer 2

His mother.

Answer 3

His mother.