More evidence that common genetic variants can produce many standard deviations of change in average phenotype. Also, while wild chickens lay ~1 egg per month, modern agricultural types lay ~1 per day.
The study is described in more detail here. Thanks to Carl Shulman for the link.
See also Plenty of room at the top and sections 3.1 and 3.3 of On the genetic architecture of intelligence and other quantitative traits.
