7 Wet ear wax W is dominant over dry ear wax w Wwet ear wax

7. Wet ear wax (W) is dominant over dry ear wax (w)

W=wet ear wax

w=dry ear wax

   a. A 3:1 phenotypic ratio of F1 progeny indicates that the parents are of what genotype?

    b. A 1:1 phenotypic ratio of F1 progeny indicates that the parents are of what genotype?

Solution

Ans:

This is the result of a problem common in trying to determine the nature of inheritance patterns in humans.

The results are combined from offspring from several families.

Thus the sticky x sticky cross includes families in which parents may be (AA x AA; Aa X AA).

aa x aa.