Twin Studies

Front

Which of the following best illustrates the interaction of nature and nurture? Options: Identical twins raised together have identical personalities., Fraternal twins raised apart have similar interests., A child with a genetic predisposition for anxiety develops symptoms after experiencing trauma., A person’s height is determined solely by their genes.

Back

A child with a genetic predisposition for anxiety develops symptoms after experiencing trauma.

Answer explanation

This example shows how genetic predisposition (nature) interacts with environmental experience (nurture).

Front

In twin studies, researchers often compare identical twins raised together with those raised apart. What is the primary reason for this comparison?

Back

To isolate the influence of shared genetics

Answer explanation

Identical twins share 100% of their genes, so comparing those raised apart helps isolate genetic influence from environmental factors.

Front

Identical twins raised in different households have similar preferences for music, food, and hobbies. What does this most likely suggest?

Back

Genetic factors contribute to individual preferences.

Answer explanation

Similar preferences despite different environments suggest a genetic influence.

Front

Identical twins raised together are more similar in intelligence than fraternal twins raised together. What does this finding support?

Back

Genetic similarity contributes to intelligence.

Answer explanation

Greater similarity among genetically identical twins supports a genetic influence on intelligence.

Front

Which of the following would most likely be used to study the effects of environment on personality? Options: Comparing identical twins raised apart, Studying monozygotic twins in the same household, Observing siblings with similar interests, Measuring personality traits in adopted children

Back

Comparing identical twins raised apart

Answer explanation

Identical twins raised apart allow researchers to isolate environmental effects since genetics are constant.