We next carried out further tests of stratification using ancestry informative markers (AIMs) that have large allele frequency differences between Africa and Europe 14. AIMs are useful in estimating ...

We may receive a commission on purchases made from links. Some seeds will germinate with no help from gardeners -- for example, those from the Halloween pumpkin you tossed into your compost pile.

Prior to the 20 th Century, one of the most common ways of seeing the world was through the lens of stratification, which is the idea that the natural world comes in different scales or layers. For ...