Transgressive segregation is the phenomenon in which two pure-breeding strains, differing in a trait, are crossed and produce individuals with phenotypes that are more extreme than either grandparent (i. e., that are larger than the largest or smaller than the smallest in the original generation). Even if two pure-breeding strains are the same for a quantitative trait, it is possible to see transgressive segregation in an Propose scenarios with specific assumptions for each of these examples of transgressive segregation.