By Dr. Peter Hackett -Yaks have 30 chromosomes, 20,000 genes, and over 3 billion base pairs in their DNA-Yaks descended from a common ancestor of cattle, bison, banteng and gaur-Yaks genetically diverged from cattle 4.9 million years ago-Yaks were domesticated on the Tibetan Plateau about 7500 years ago-This permitted human expansion in that area-Domestication may … Continue reading Yak facts: Did You Know?