Hybrid Horribles and Lactose tolerance
Lactose tolerance only evolved in Europeans a few thousand years ago, some time after dairy farming began. It’s believed to be the most important gene trait to have developed in the last 30,000 years.
Lactose tolerance only evolved in Europeans a few thousand years ago, some time after dairy farming began. It’s believed to be the most important gene trait to have developed in the last 30,000 years.