The fact that identical twins have approximately a 50 percent concordance rate for homosexuality was presented as evidence for the possible basis for sexual orientation.

Name: The fact that identical twins have approximately a 50 percent concordance rate for homosexuality was presented as evidence for the possible basis for sexual orientation.
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The concordance rate among identical twins suggests a genetic or biological component to sexual orientation, as identical twins share the same genetic makeup.

The Fact That Identical Twins Have Approximately a 50 Percent