If the Correlation Between Identical Twins on Trait R Is

question 3

Multiple Choice

If the correlation between identical twins on Trait R is higher than the correlation between fraternal twins on Trait R, behaviour geneticists conclude that:

• A) genetic factors are important in the development of Trait R.
• B) genetic factors are irrelevant to the development of Trait R.
• C) environmental factors are irrelevant in the development of Trait R.
• D) genetic factors and environmental factors play equivalent roles in the development of Trait R.