NEET BIOLOGY

Detailed explanation-1: -Characteristics in an individual organism are caused by both genetic and environmental variation. For example, the weight of a dog is caused partly by its genes-inherited-and partly by what it eats-environmental.

Detailed explanation-2: -Genes give the body instructions for responding to changes in its environment. Studies of resemblances and differences among family members, twins, and adoptees offer indirect scientific evidence that a sizable portion of the variation in weight among adults is due to genetic factors.

Detailed explanation-3: -Continuous variation refers to characteristics like weight or height, which change gradually.

Detailed explanation-4: -Obesity is determined by the genetics as well as obesogenic environment [4-5]. It was first studied in 1994 that Ob gene and leptin play an important role in determining the body weight of an individual [6].

Detailed explanation-5: -Genetic influences Research suggests that for some people, genes account for just 25% of the predisposition to be overweight, while for others the genetic influence is as high as 70% to 80%. Having a rough idea of how large a role genes play in your weight may be helpful in terms of treating your weight problems.