Which of the following supports the notion that heredity contributes to differen

Question

Which of the following supports the notion that heredity contributes to differences in body weight? Question 28 options: a) Pima Indians in the U.S. and Mexico share the same genes, but only those persons who live in a particular environment develop obesity. b) Several forms of human obesity involve a deficit in ghrelin production, which can be treated by ghrelin injection. c) Twin studies indicate that genes account for 25 percent of the variability in body fat accumulated when people are fed a high-fat diet. d) Twin studies indicate that genes account for little of the variability in body fat accumulated when people are fed a high-fat diet.

Explanation / Answer

a) Pima Indians in the U.S. and Mexico share the same genes, but only those persons who live in a particular environment develop obesity. Incorrect differences in body weight is due to environment.

b) Several forms of human obesity involve a deficit in ghrelin production, which can be treated by ghrelin injection. Incorrect

c) Twin studies indicate that genes account for 25 percent of the variability in body fat accumulated when people are fed a high-fat diet. Correct. Heredity do accounts for differences in body weight.

d) Twin studies indicate that genes account for little of the variability in body fat accumulated when people are fed a high-fat diet. Incorrect. It shows heredity do not contribute to differences in body weight.

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