 Complete the following phrase:  Recent sequencing of Neanderthal and Denisovan genomes shows that some admixture with these populations has occurred. All modern human groups outside Africa have 14 or according to more recent research about 1.52.6 Neanderthal alleles in their genome, and some Melanesians have an additional 46 of Denisovan alleles. These new results do not contradict the out of Africa model, except in its strictest interpretation, although they make the situation more complex. After recovery from a genetic bottleneck that some researchers speculate might be linked to the 