Twin studies help us estimate how much of a trait or behavior is attributable to _____, whereas adoption studies shed light on the extent to which attributes and behaviors are influenced by ______.
A) genes; the environment
B) the environment; genes
C) siblings; parents
D) random events; a controlled environment

Question

Quizplus · Accepted Answer

Twin studies compare the similarities in certain traits or behaviors between identical and fraternal twins who share different percentages of genes. This helps us estimate how much of a trait or behavior is attributable to genes. Adoption studies compare the similarities in certain traits or behaviors between adopted children and their adoptive and biological parents. This helps us shed light on the extent to which attributes and behaviors are influenced by the environment. Therefore, genes are attributable to twin studies, and the environment is attributable to adoption studies.

Twin Studies Help Us Estimate How Much of a Trait