Study: Sleep needs linked to gene

(AP Photo)

November 29, 2011 1:48:02 PM PST
If you feel groggy in the morning, you may have genetics to blame.

Researchers in Germany have linked the need for less sleep to a gene call ABC C9.

Scientists studied 4,000 people from seven European countries.

They found people with two copies of the gene slept less than those with different genetics.

The gene has been previously linked to heart disease and diabetes.