Problem:
A woman with tritanopia (a rare form of inherited blue-yellow color blindness) marries a man who also has tritanopia. Their first daughter has normal colour vision but is diagnosed with PKU
Required:
Question 1: Based on this information, what is the most likely mode of inheritance of tritanopia?
Question 2: Using symbols of your own invention, write the genotypes of the two parents and of their daughter (Assume independent assortment.)
Question 3: What is the probability that the couple's next child is a son with tritanopia and PKU?
Could someone help to explain the answer of these questions.