AP PSYCHOLOGY

Detailed explanation-1: -In addition to genetic and biological determinants, height is also influenced by environmental factors, including a mother’s nutrition during pregnancy, whether she smoked, and her exposure to hazardous substances.

Detailed explanation-2: -Recent research has revealed that obesity is to a very large extent encoded in our genes. Indeed, studies of identical twins reveal that the heritability of obesity ranges between 70–80 percent, a level that is exceeded only by height and is greater than for many conditions that people accept as having a genetic basis.

Detailed explanation-3: -The main factor that influences a person’s height is their genetic makeup. However, many other factors can influence height during development, including nutrition, hormones, activity levels, and medical conditions. Scientists believe that genetic makeup, or DNA, is responsible for about 80% of a person’s height.

Detailed explanation-4: -Height and other similar features are controlled not just by one gene, but rather, by multiple (often many) genes that each make a small contribution to the overall outcome. This inheritance pattern is sometimes called polygenic inheritance (poly-= many).