Consider a Trait Determined by a Rare Mutation in the Y

question 110

Multiple Choice

Consider a trait determined by a rare mutation in the Y chromosome. What is the concordance between male twins? Between fraternal twins that are both male?

• 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

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