Purity of gametes, [24]

Purity of type, [155]

Rabbits, [53], [60]

Ratios, Mendelian—

3 : 1, [20]

9 : 3 : 3 : 1, [25], [34]

9 : 3 : 4, [51]

9 : 7, [49]

Ray, John, [143]

Recessive characters, [19]