Question

If a couple has a 50% chance of producing an XX chromosome offspring withred-green colour deficiency, what is the genotype of the couple? For thecouple in Q5 (above) what is the percentage chance that their offspring willbe XY with normal colour vision? *note* Please enter numbers only - up to amaximum of 3 digits (0-100)

Answer 1

If the parents have XXrgrg and XYrg genotype, they have a 50% chance of producing an individual XX with red-colour deficiency.

Therefore, their offspring has 0% chance of being XY with normal colour vision.