Sentences with phrase «previous genetic studies only»

Although previous studies have found that a large percentage of hair colour variation is explained by heritable factors, previous genetic studies only identified a dozen or so hair colour genes.

Not exact matches

Previous studies that used only information from genetic analyses of current species have suggested that birds arose anywhere from 72 million to 170 million years ago.

Anthropologists and geneticists know that populations throughout the world migrated from Africa more than 60,000 years ago (see diagram), and that the human genome is at its most diverse in our continent of origin, but previous studies have only scratched the surface of African genetic diversity.