project repo for a meta-analysis of inheritance patterns across the tree of life
As a rule, hybrids do not represent the form exactly intermediate between the parental strains...Those traits that pass into hybrid association entirely or almost entirely unchanged, thus themselves representing the traits of the hybrid, are termed dominating, and those that become latent in the association, recessive. (Mendel 1865)
Despite Mendel's assertion of widespread non-additive inheritance, in reality we haven't a clue whether this is true! I think it would be worthwhile to know, quantitatively, what hybrids look like, and whether there are any differences between clades/trait-types in inheritance patterns. More soon!
Mendel, G. Versuche über Plflanzen-hybriden.Verhandlungen des naturforschenden Ver-eines in Brünn, Bd. IV für das Jahr 1865, Abhand-lungen, 3–47 (1866) (Bateson translation)