Which of the following statements about genetic factors in obesity is TRUE?
A)The genetic contribution to obesity is about 75 percent.
B)The weight of an adopted child is more closely related to the weights of the adoptive parents than to the weights of the biological parents.
C)Researchers have identified a single gene responsible for obesity.
D)Genetic factors influence body fat distribution.

Question

Quizplus · Accepted Answer

Genetic factors do play a role in obesity, but the contribution is not as high as 75 percent (choice A). Studies have shown that adopted children's weights are more closely related to their biological parents' weights than to their adoptive parents' weights (eliminating choice B). Obesity is a complex condition influenced by multiple genes, and researchers have not identified a single "obesity gene" (eliminating choice C). One way that genetics influence obesity is through body fat distribution, with some individuals genetically predisposed to store more fat in certain areas of the body (such as the abdomen) than others. Therefore, choice D is the correct answer.

Which of the Following Statements About Genetic Factors in Obesity