Question

Suppose that two people having free earlobes start a family. The first child has free earlobes and their second has attached earlobes.
a. What are the genotypes of the parents? ______________.
b. What is the genotype of their first child? ________.
c. What is the genotype of their second child? _______.

Answer 1

Answer:

F is for free, f is for attached

a. Ff, Ff

b. FF, or Ff

c. ff

Explanation:

Parents and first child have free earlobes so it must be dominant trait while attached is recessive. In order to have a recessive trait as seen in the second child, the parents must have a recessive allele.