Young Brunette Girl Reveals At The Round Table In The Morning

Morning meals include breakfast, though logically this need not be in the morning, and are varied across cultures. Brunch is a late morning meal.
The ability of a person to wake up effectively in the morning may be influenced by a gene called "Period 3". This gene comes in two forms, a "short" and a "long" variant. It seems to affect the person's preference for mornings or evenings. People who carry the long variant were over-represented as morning people, while the ones carrying the short variant were evening preference people.