In humans, red-green color blindness is caused by a recessive sex-linked trait on the X chromosome. If a man and a woman produce a color blind son, assuming no spontaneous mutation, which of the following must be true?
W) The father is color blind
X) Both parents carry the allele for color blindness
Y) The mother carries the allele for color blindness
Z) Neither parent carries the allele for color blindness
✔️Answer:Y) THE MOTHER CARRIES THE ALLELE FOR COLOR BLINDNESS
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