What type of study revealed the following finding regarding male same-sex sexual orientation? "Where at least one twin was homosexual, 52% of monozygotic twins and 22% of dizygotic twins were both homosexual. (By comparison, in cases in which at least one adoptive brother was homosexual, 11% of these brothers were both homosexual.) "

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This finding is from a genetic study, as it compares the concordance rates of homosexuality between monozygotic (identical) twins, dizygotic (fraternal) twins, and adoptive brothers, highlighting the genetic influence on male same-sex sexual orientation.

What Type of Study Revealed the Following Finding Regarding Male