You are attending a family reunion of your dad's extended family.You often wonder how you could be related to any of them based on their physical and behavioral characteristics.What is the chance you share an allele with your first cousins?
A)One sixteenth
B)One eighth
C)One fourth
D)One half

Question

Quizplus · Accepted Answer

First cousins share one-eighth of their alleles on average because they have one set of grandparents in common. Each parent passes on half of their alleles to their children, so the probability of sharing an allele with a first cousin is 1/2 (from your parent) * 1/2 (from your uncle/aunt) = 1/4, and since you have two parents, it's 1/4 * 1/2 = 1/8.

You Are Attending a Family Reunion of Your Dad's Extended