A Colorblind Woman Marries a Man Who Is Not Colorblind

Multiple Choice

A colorblind woman marries a man who is not colorblind. All of their sons, but none of their daughters, are colorblind. Which of the following statements correctly explains these results?

A) The gene for color vision is incompletely dominant to the gene for sex determination.
B) The gene for color vision is codominant with the gene for sex determination.
C) The gene for color vision is found on the X chromosome.
D) The gene for color vision is found on the Y chromosome.