Individuals with a sex-linked condition called red-green color blindness do not see
 the colors red and greed, Red-green color blindness is caused by the recessive allele
 b and is carried on the X chromosomes. The dominant allele for normal color vision
 is B. When the X chromosome contains the dominant allele, the allele is written as
 XB, when the X chromes contains the recessive allele, the allele is written as Xb.
 A man who is color-blind marries a woman who is not color-blind and is not a carrier
 of the allele for color blindness. Create a Punnett Square to predict the possible
 genotypes of their children,
 What percent of their children will be colorblind?
 A.) 0%
 B.) 25%
 C.)50%
 D.) 100%