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.
If you suspect that your child is colorblind: Have him or her evaluated by a professional. Before you make the appointment, make sure the office has a color vision test, and that it is appropriate for your child. If your child is not confident with numbers, there are tests that use shapes instead.