The Monk in the Garden: The Lost and Found Genius of Gregor Mendel, the Father of Genetics

by Robin Marantz Henig

each parent is Aa—in other words, hybrid for the characteristic symbolized by A—the product of (Aa) X (Aa) is the combination series A + 2Aa + a; that is, one dominant offspring for every two hybrids for every one recessive.