What Is the Likelihood of Your Sharing an Allele with a Parent

Multiple Choice

What is the likelihood of your sharing an allele with a parent or with a sibling?

A) The chance that you share an allele with either a parent or a sibling is one fourth.
B) The chance that you share an allele with either a parent or a sibling is one half.
C) The chance that you share an allele with a parent is one-half and with a sibling,one fourth.
D) The chance that you share an allele with a parent is one-fourth and with a sibling,one eighth.