What did the slave trade cause a power shift in africa

Wealth pure and simple. Slaves were the first "Black Gold" long before the discovery of a use for petroleum. The demand for slaves in the Americas, could make a handy profit. When they found out they could also turn a profit delivering sugar and rum to Europe, their profits doubled. By picking up trade good and Iron in Europe for delivery to Africa their profits trebeled. Two circuits and a crewman could buy a pub with his share and the Captain could buy a country home and retire for life.

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.