where do we find the highest genetic diversity among human populations
Human genetic variation Alleles occur at different frequencies in different human populations, with populations that are more geographically and ancestrally remote tending to differ more, a phenomenon known as isolation-by-distance. The differences between different populations represent a small proportion of overall human genetic variation. Populations also differ in the quantity of variation among their members, with greatest diversity among African populations. This is consistent with the theory that humans recently migrated out of Africa. Populations also vary in the (always small) proportion of DNA they received from archaic hominid populations, such as Neanderthals and Denisovans.
Human genome There are an estimated 19,000-20,000 human protein-coding genes.[4] The estimate of the number of human genes has been repeatedly revised down from initial predictions of 100,000 or more as genome sequence quality and gene finding methods have improved, and could continue to drop further.[5][6] Protein-coding sequences account for only a very small fraction of the genome (approximately 1.5%), and the rest is associated with non-coding RNA molecules, regulatory DNA sequences, LINEs, SINEs, introns, and sequences for which as yet no function has been determined.[7]