Colorblindness redgreen is a sexlinked trait Draw a Punnett

Color-blindness (red-green) is a sex-linked trait. Draw a Punnett square showing phenotypes. genotypes, and ratios of children from a mother who is AB and a carrier for colorblindness and a type O father who has normal vision.

Solution

Color blindness is an X linkedd recessive inheritance.

Let C be the allele for color blindness

Mother is AB and carrier for colorblind - I^AI^B   X^CX^c

Father is O type and normal vision - I^oI^o   X^c Y

Cross between I^AI^B   X^CX^{c X} I^oI^o   X^c Y

The daughters are normal half with A blood group and half with B blood group. The genotypes are XC Xc AO , XC Xc BO, Xc Xc AO,   Xc Xc BO

The sons will XC Y AO( color blind), XcY AO( normal vision) , XC Y BO( color blind), XcY BO( normal vision) . Half are normal and half are color blind. Half are A blood group and half are B blood group.