Compare the roles of heredity and lifestyle in determining your body shape and body weight

Some genes have been shown to predispose someone to obesity. These genes have been shown to influence appetite and food intake in this person. Therefore a mutation in this gene can cause increased appetite, high food intake and carrying more fat in the body.

However, lifestyle is the biggest contributor to body shape and size. A sedentary lifestyle is the biggest attribute to being overweight as compared to genetic predisposition.