biology
posted by john .
Consider the pedigree below. Individual 1 is homozygous normal. Individual 2 is both redgreen color blind and a hemophiliac. Individual 6 is the as yet unborn son of 4 and 5.
What is the probability that their son, 6, will be both color blind and a hemophiliac? Express your answer as a number between 0.0 and 1.0. You may use as many significant figures as necessary.

0.5