If one twin has Syndrome Z and the other is more likely to have it than the average non-related individual, then Syndrome Z is
A) concordant.
B) discordant.
C) dissimilar.
D) similar.
E) dizygotic.

Question

Quizplus · Accepted Answer

Concordance refers to the agreement between twins with respect to a trait. If one twin has Syndrome Z and the other also has it, they are concordant. This suggests a possible genetic component to the disorder. If the twins had different outcomes (one had Syndrome Z and the other did not), they would be discordant. Therefore, option A is the correct answer.

If One Twin Has Syndrome Z and the Other Is