Free earlobes is dominant to attached earlobes. A man with attached earlobes and a woman who is heterozygous..

Question

have a child. What is the probability of their first child having free earlobes?

a. 0 %
b. 25%
c. 50%
d. 75%
e. 100%

much appreciated. thanks.

Answer 1

The answer is c 50%

Answer 2

The answer is c. 50%.
Let F be free earlobes.
Let f be attached.
The man's genotype would be ff because attached earlobes is recessive. The woman would be Ff because she is heterozygous.
If you do the cross, it will look like this:
F f
f Ff ff
f Ff ff
Thus, there is a 50 percent chance of the child having free earlobes.