#3

If this disease is genetic--what are the possible genotypes of the parents?

+ = Normal Vision (Dominant)
o = Color Blindness (Recessive)

Sex	Color-blind	Normal Vision
Male	XoY	X+Y
Female	XoXo	X+X+ X+Xo

Male has disease= DadX^oY- disease MomX⁺X⁺.X⁺X^o-Carrier or not
Male has disease= DadX⁺Y-doesn't has disease MomX⁺X^{o- Carrier}
Female has disease= DadX^oY- disease MomX⁺X⁺, X⁺X^o- Carrier or not



http://waynesword.palomar.edu/colorbl1.htm