First- Degree Relatives Share 50% of Their Alleles, Second- Degree

Multiple Choice

First- degree relatives share 50% of their alleles, second- degree relatives share 25% of their alleles, and third- degree relatives share 12.5% of their alleles. Which of the following are third degree relatives?

A) grandparents of an individual
B) parents and their children
C) siblings
D) the aunts or uncles of an individual
E) none of these relationships is third- degree