AP PSYCHOLOGY

Detailed explanation-1: -For most individuals, though, height is controlled largely by a combination of genetic variants that each have more modest effects on height, plus a smaller contribution from environmental factors (such as nutrition). More than 700 such gene variants have been discovered and many more are expected to be identified.

Detailed explanation-2: -You inherit physical traits such as the color of your hair and eyes, shape of your nose and ears, as well as your body type and size. You also inherit basic intellectual abilities as well as tendencies toward specific diseases.

Detailed explanation-3: -For height, Visscher and colleagues estimate a heritability of 79%, and for BMI, 40%. This means that if you take a large group of people, 79% of the height differences would be due to genes rather than to environmental factors, such as nutrition.

Detailed explanation-4: -Scientists believe that DNA is responsible for about 80% of a person’s height. This means, for instance, that tall people tend to have children who also grow up to be tall. People usually grow until they reach 18 years of age. Before then, a range of environmental factors can affect how tall they become.