If your dad is short and overweight, your mom is short and overweight, you'll be short and overweight, too, right? Not necessarily.

Genetics do play a role in your body type. Just like genetics determine your height, they also control your body shape and -- to a certain extent -- can predispose you to being overweight. There are three different body types:

• Ectomorphs are tall and slim.
• Mesomorphs are muscular and compact.
• Endomorphs are round with short limbs.

Your genetic body type contributes to about 30%-50% of your weight. But the rest is up to you. Your lifestyle -- including exercise and eating habits -- contributes the most to your weight. So, while you have to settle for whatever height your genetic makeup gives you, your weight is largely under your control.

Check out this AOL Health video for more details on body types, genetics, and how you're in control of your weight.