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.
Each time two carriers of the disease conceive, there is a 25 percent chance of passing cystic fibrosis to their children ; a 50 percent chance that the child will be a carrier of the cystic fibrosis gene; and a 25 percent chance that the child will be a non-carrier.