Explain one criticism of the biological approach.

Point - A limitation of the biological approach to explaining human behaviour is its reliance on twin studies which cannot differentiate between the effects of nature and nurture.Example - MZ twins are more likely to be treated similarly than DZ twins due to sharing identical traits such as physical appearance. Explanation - This is a problem because the approach makes the equal environment assumption which claims that the concordance rates of MZ twins are higher purely due to similar genes; it does not account for social contexts such as receiving similar treatment. Link - Therefore, this reduces the validity of the biological approach as it is an incomplete explanation.