When George is the father, there is a 50% chance of having a color blind daughter, but when Gerg is the father, all of the girl children are normal, indicating that George is the father. As a conclusion, option B "George only" is the right response.
Because red, green color blindness is an x linked recessive disease, the defective allele is denoted by x' and the normal allele by x. Gail's genotype will be x'x because she is heterozygous for the trait. George is colorblind, so his gemotype is x'y. a hybrid of Gail and George Color blindness is defined as the inability to see colours normally. Color deficiency is another term for it. Color blindness occurs when a person is unable to distinguish between certain colours.
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