Study Reveals How Genetic Uniformity Affects Offspring Fertility for Generations

When it comes to the architecture of the human genome, it’s only a matter of time before harmful genes — genes that could compromise future generations — arise in a population. These mutations accumulate in the gene pool, primarily affected by a population’s size and practices like marrying within a small community. New research published in the Proceedings of the National Academy of Sciences (PNAS) journal provides rare direct evidence showing that increased homozygosity — meaning two identical alleles in a genome — leads to negative effects on fertility in a human population.

Denisovans or Homo Sapiens: Who Were the First to Settle (Permanently) on the Tibetan Plateau?

The Tibetan Plateau has long been considered one of the last places to be populated by people in their migration around the globe. A new paper by archaeologists at UC Davis highlights that our extinct cousins, the Denisovans, reached the “roof of the world” about 160,000 years ago — 120,000 years earlier than previous estimates for our species — and even contributed to our adaptation to high altitude.

Asked and Answered: Why Haven’t All Primates Evolved Into Humans?

Many people mistakenly think of evolution as progress. But humans, despite their ability to manipulate objects and change their environment, are not “on top” of the world’s species. Research by Lynn Isbell, chair of the UC Davis Department of Anthropology, suggests that ancestral humans and other primates developed different strategies to find food and avoid predators.