The Long and the Short of It
No one unfamiliar with practical horticulture would suspect that these two pears were grown from seeds of the same fruit. They illustrate the strangely varied hereditary factors that find lodgment in the germ cells of a cultivated fruit. And of course they furnish material for selective breeding through which new varieties may be developed.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 4 Chapter 4