As mentioned previously, it is now clear that obesity is the result of interplay between the genetic and environmental factors. Although researchers have not yet identified the clear link between the genes and obesity, there are certain genetic conditions which are associated with obesity such as Down syndrome, Alström’s syndrome, Bardet-Biedl syndrome, Prader - Willi syndrome etc. They have also found out that sometimes single-gene disorders such as congenital leptin deficiency (Dubern B, 2012) and defects in the melanocortin 4 receptor (Mergen M et al, 2001) are also responsible for morbid childhood obesity.
According to research, heredity also plays a strong causal role in obesity. Many times we see obesity running in families. It is reasonable