Consider a Trait Determined Entirely by Environmental Risk Factors for Which

question 101

Multiple Choice

Consider a trait determined entirely by environmental risk factors for which the chance that a random individual is affected is 20%. What is the concordance between identical twins? What is the concordance between same-sex fraternal twins?

• A)identical concordance = 1.0; fraternal concordance = 0.125
• B)identical concordance = 0.125; fraternal concordance = 0.125
• C)identical concordance = 0.125; fraternal concordance = 0.111
• D)identical concordance = 0.111; fraternal concordance = 0.111
• E)None of the answer options is correct.

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Definitions:

Square Root

An amount which yields the initial number when squared.

Square Inches

A unit of area measurement for two-dimensional space, equivalent to the area of a square with sides of one inch.

Domain

The set of all possible input values for which a given function is defined.

Function

A mapping from a set of inputs to a set of acceptable outputs, where each input is allocated to a sole output.