In identical twin pairs, the probability that both twins will have a disorder if one twin has the disorder is called the

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The probability that both twins will have a disorder if one twin has the disorder is called the concordance rate. This is often used in twin studies to understand the heritability of certain disorders or traits. The concordance rate is calculated by dividing the number of twin pairs where both twins have the disorder by the total number of twin pairs where one twin has the disorder.

In Identical Twin Pairs, the Probability That Both Twins Will