How do you describe color blue to a blind man since birth?
You simply can't.
This is a very interesting question, and believe it or not, it comes up frequently. I personally think (and I could be totally wrong), that there is no way to describe any color to some one who has been blind from birth. We can also ask, "does a blind person from birth dream, and if so what do they see, if anything." I will be looking in on this question from time to time. I…
What is the probability of color blindness if the father is color blind and the mother carries the trait?
All daughters are normal, half the sons are color blind. The above answer is incorrect. Half of the daughters are color blind and half of the sons are color blind. Since the father always donates color blindness, it is up to the mother in each case (in the son's case, the father is irrelevant) to determine if the child is color blind or not. Since she is a carrier, the chance is 50-50.