Consider a trait determined by a rare mutation in mitochondrial DNA. What is the concordance between identical twins? Between same-sex fraternal twins?
A)identical concordance = 1; fraternal concordance = 0
B)identical concordance = 1; fraternal concordance = 1/4
C)identical concordance = 1; fraternal concordance = 1/2
D)identical concordance = 1; fraternal concordance = 3/4
E)identical concordance = 1; fraternal concordance = 1

Question

Quizplus · Accepted Answer

Mitochondrial DNA is inherited maternally, so both identical and fraternal twins will have the same mitochondrial DNA, leading to a concordance of 1 for both.

Consider a Trait Determined by a Rare Mutation in Mitochondrial