Apopulation of lizards lives on island a. on nearby island b, another population of the same species is present. the lizards on island a have evolved to have a large frill around their necks. the lizards on island b, on the other hand, have evolved to have a much smaller neck frill. both islands are colonized by humans and some of the lizards on island a are transferred to island b. the lizards from island a interbreed with the lizards on island b. the gene coding for the large neck frill is passed on to the offspring resulting from these breedings, introducing new genetic variation into the population. the transfer of genetic information that occurs between the two lizard populations above is known as