31.  The finding also takes scientists a little closer in their quest to understand the genetic component of obesity, Mitchell said.

32.  They said that fact suggested a genetic component.

33.  Todhunter supports the theory of a genetic component.

34.  Today, researchers believe there is a strong genetic component to autism, which is three to four times more common in boys than girls.

35.  Previous research has revealed the strong genetic component to obesity.