Die zweite Gruppe enthält die Formen ABb, aBb, AaB, Aab; diese sind in einem Merkmale constant, in dem anderen hybrid, und variiren in der nächsten Generation nur hinsichtlich des hybriden Merkmales.
The second group contains the forms ABb, aBb, AaB, Aab; these are constant with respect to one trait, hybrid with respect to the other, and vary in the next generation with respect to the hybrid trait only.
forms = Formen See p. 3, s. 8.
constant = constant See p. 5, s. 5.
hybrid = hybrid See p. 15, s. 7. This sentence reveals how strictly Mendel defined the quality of being hybrid by the behaviour of traits in later generations, i.e. by observing whether traits segregate in the next generation or not; cf. p. 15, s. 1 ff.