Translations:Em Tradução:Experiments in Plant-Hybridisation (en)/108/en

If n represent the number of the differentiating characters in the two original stocks, 3ⁿ gives the number of terms of the combination series, 4ⁿ the number of individuals which belong to the series, and 2ⁿ the number of unions which remain constant. The series therefore embraces, if the original stocks differ in four characters, 3⁴ = 81 of classes, 4⁴ = 256 individuals, and 2⁴ = 16 constant forms; or, which is the same, among each 256 offspring of the hybrids there are 81 different combinations, 16 of which are constant.