Question

What does the example of two brothers with different personalities (one extroverted and one introverted) demonstrate?

Options

• The environment has no effect on personality.

• Genes completely control all behaviors

• Genetic makeup creates differences even in the same environment.

• Only birth order determines personality.

Answer 1

Genetic makeup creates differences even in the same environment.

Explanation: 

When siblings raised in the same home show different personality traits, it demonstrates that genetic differences contribute to personality variations, even when environmental factors are similar.