A study published PLoS Genetics says genetics account for about  51% of your height, weight and body shape, 25% of your cardiovascular function and about 40% of certain blood characteristics (sugar and cholesterol levels.)

But if think your Wild Child ways is your parents' fault, it's probably not. Only about 19% of genes play a part in determining known personality traits such as neuroticism, extraversion, agreeableness and conscientiousness.

Professor Gon?o Abecasis, one of the researchers from the Center for Statistical Genetics, University of Michigan thinks humans evolve to have very diverse personalities compared to say, the limited shapes of human butt.  The team's theory suggests genes have little influence over our personality traits. It's more likely genetic and environment.

The research studied 6148 people from Sardinia in the Mediterranean and the team believes their study is the largest ever published for the traits they examined.

The next time you wake up with a massive hang-over that feels like a dinosaur stomped on your head, don't blame your mom and pop even if they happen to be the spawn of Tommy Lee and Pamela Anderson.