Humans have divergent genes, it's just that there's no particular grouping to talk of. You can find that generally speaking people from Thailand are mostly lactose intolerant while people from India are mostly not, to take one example. But you don't find general correlations between more than samples of certain genetic features. We haven't been through selective breeding like dogs have. And the genetic diversity between humans as a whole is quite low, lower than for many other primates - presumably due to a population bottleneck before "out of Africa" even happened. Chimpanzees are much more diverse genetically than humans (https://academic.oup.com/gbe/article/13/11/evab247/6426081), ref. the common "two humans from across the globe are closer genetically than two chimps from the same forest".