Family Studies Can Indicate Whether a Trait Runs in Families

question 20

Multiple Choice

Family studies can indicate whether a trait runs in families, but they cannot provide conclusive evidence that a trait is influenced by heredity because ​

• A)there are too many dependent variables in family studies.
• B)random assignment is impossible in family studies.
• C)there are no independent variables in family studies.
• D)family members share not only genes but also similar environments.

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