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If the mother is a carrier of colour bli...

If the mother is a carrier of colour blindness and the father is normal, show the possible genotype and phenotype of the offspring of the next generation, with the help of a punnet square.

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The colour blind .gene. is carried on one of the X chromosomes. So, for a male to be colour blind the faulty colour blindness .gene. only has to appear on his X chromosome. For a female to be colour blind it must be present on both of her X chromosomes. If a woman has only one colour blind .gene. she is known as a .carrier. but she won.t be colour blind. When she has a child she will give one of her X chromosomes to the child. If she gives the X chromosome with the faulty gene. to her son he will be colour blind, but if he receives the .good. chromosome he won.t be colour blind.
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