The most effective approach to estimate the heritability of a trait is to compare blood relatives within families.

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The most effective approach to estimate the heritability of a trait often involves twin studies, comparing identical twins (who share nearly all their genes) with fraternal twins (who share about half their genes), rather than just comparing blood relatives within families. This method allows researchers to more accurately separate the effects of genetics from the environment.

The Most Effective Approach to Estimate the Heritability of a Trait