Color-blindness is inherited as a recessive X-linked condition. A husband and wife have normal vision, although both of their fathers are red-green color-blind and both have mothers with normal vision.

a. Define symbols for color-blindness.

b. Draw a pedigree for this family. Indicate the genotypes of all individuals under their symbol on the pedigree. If the second allele of a female is unknown, just write the pedigree with a line such as XAX_ .

c. .Using this pedigree, determine the probability that their first child is a normal daughter? Show the probability calculations or a Punnett square as part of your answer.

d. Using this pedigree, determine the probability that their first child is a normal son? Show the probability calculations or a Punnett square as part of your answer.

e. Using this pedigree determine the probability that their first child is a color-blind (regardless of gender? f. Using this pedigree determine the probability that they will have a colorblind son or a normal daughter?