Question

In humans, earlobes that are suspended are dominant over those that are attached. If a mother has suspended earlobes (but her mother did not) and the father has attached earlobes, what are the chances that their first child will have attached earlobes? What about the fourth child?

Answer 1

Genotype Primery Is 30/70 so 30%

Answer 2

Let S - Suspended earlobe
s - Attached earlobe