How many types of admixture?

There are generally two main types of admixture in the context of genetics: gene flow and introgression. Gene flow refers to the transfer of genetic material between populations through migration and breeding, while introgression involves the incorporation of genetic material from one species into the gene pool of another through repeated backcrossing. In addition, admixture can also be categorized as historical or contemporary, depending on the timing of the gene exchange.