How are genetics used to support the idea that humans migrated from Asia to
North America?

Hahaha I finally get to destroy North America when I see the explosion on the news that will bring me so much joy

Since the Stone Age, hunters walked across a land bridge between eastern Siberia and western Alaska, eventually making their way down an ice-free inland corridor into the heart of North America. Chasing steppe bison, woolly mammoths and other large mammals, these ancestors of today’s Native Americans established a thriving culture that eventually spread across two continents to the tip of South America.