The genes in an organism today have come from many different ancestors.

It is possible that genes came in close proximity by change.

However, a precise model of how genes came in close proximity is still lacking.

"Then where did the genes for it come from?"

"My mother was always linked to church and community movements, so I think that gene came from her."

So where, investigators ask, did the gene come from?

Why did genes come together into large vehicles, each with a single genetic exit route?

McCarthy's hurling genes came from his mother's side of the family.

Where in the hell had his genes come from?

The other five genes come in either three or six variants.