The skin's dermis is made of layers of cells, connective tissue and several structures that aid in maintaining its function. These structures include blood vessels, hair follicles, lymph vessels and glands.
XnY one color blind boy. 1  Probability of having a color blind daughter is (1/2 x 1/2) or 1/4 or 25% (0.25) This is because both sex and colorblindness are involved in the solution.  The probability that their first son is color blind is 50% (0.50). In this question only males are part of the solution.
Red-green color blindness is caused by a sex-linked recessive allele. A color-blind man marries a woman with normal vision whose father was color-blind. (a) What is the probability that they will have a color-blind daughter? (b)What is the probability that their first son will be color-blind?