Gene Explains Why Some People Are Night Owls

I wonder if this explains me?

A genetic mutation called the "after-hours gene" may explain why some people are night owls, it is revealed in Science journal today.

The altered gene, named "after hours" or Afh, is a variant of a gene called Fbxl3, which had not been linked to the body clock that keeps our metabolism, digestion and sleep patterns in tune with the rising and setting of the sun.

By monitoring laboratory mice, scientists noticed that instead of following the typical 24-hour pattern some animals had body clocks that stretched to a 27-hour day.