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.
A number of explanations may account for the underutilization of colorectal cancer screening in the population (60). To begin, it is likely that physicians inadequately promote colorectal cancer screening, possibly because of their lack of knowledge or understanding of the risks and benefits of screening.