O 1b

Theoretical Example of Mendelian Inheritance in Peas. (After Laurie.)

O 1c

Theoretical Example of Mendelian Inheritance, with Dominance, in Mice. (After Laurie.)

O 1d

Illustration of the Theory of Gametic Purity in Mendelian Heredity in Mice. (After Laurie.)

O 1e

Example of Mendelian Inheritance, without Dominance, in Blue Andalusian Fowls. (After Laurie.)

O 1f

Illustration of the Theory of Gametic Purity in Mendelian Heredity, in Blue Andalusian Fowls. (After Laurie.)