Question
0.33334 points (Ext QUESTION 59 Red-green colorblindness is an X-linked recessive trait in humans. What is...
0.33334 points (Ext QUESTION 59 Red-green colorblindness is an X-linked recessive trait in humans. What is the probability that a colorblind woman and a man with normal vision will have a colorblind son? 75 percent 50 percent 25 percent 0 percent
Answers
Ans: 50 percent.
Explanation: The red-green color perception defect is due to a mutation on the X-chromosome which is responsible for red-green color blindness. X-linked red-color blindness is a recessive trait. Females have a 100% chance of being carriers of this gene. Females heterozygous for this trait have normal vision. Males inherit their single X-chromosome from their mothers (here mother is color blind) and become red green color blind. Hence there is almost certainly a 50% chance that any one of your sons will be affected by red-green colorblindness.
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