When a fresh nucleus has been thus formed (by amphimixis) in each of the copulating cells, they again separate.
amphimixis: the mingling of the germ plasm of two individuals.
amphimixis, as we have seen, is one of the most potent forces against which the evolution of a new species has to contend.
amphimixis am·phi·mix·is (ām'fə-mĭk'sĭs)
The union of the sperm and egg in sexual reproduction.