mid-parent

Updated: July 16, 2025

According to Galton's celebrated law of ancestral inheritance, the qualities of any organism are determined to the extent of a certain fraction by its two parents taken together as a "mid-parent," that a smaller definite fraction is contributed by the grandparents taken together as a mid-grandparent, and so on to earlier generations.

Henry Edward Crampton - The Doctrine of Evolution: Its Basis and Its Scope