What in Genetics is hybridization?
The Hybridization in Genetics is the crossing of individuals from "pure" and different lineages in relation to a given trait that is the crossing of different homozygous for the studied trait.
In the Mendel's experiments with peas, for instance, a plant from a green pea lineage obtained from self fecundation of its ascendants through several generations was crossed (cross fecundation) with another plant from a yellow lineage also obtained by self fecundation of ascendants. (The self fecundation by several generations of ascendants and the exclusive obtainment of individuals with the desired characteristics ensured that the individuals of the parental generation were "pure" that is homozygous for that characteristic.)