Die Formen, welche in der ersten Generation eines oder mehrere von den recessiven Merkmalen erhielten, blieben in Bezug auf diese ohne Ausnahme constant.
The forms that in the first generation received one or more of the recessive traits remained constant with respect to these without exception.
forms = Formen See p. 3, s. 8.
first generation = ersten Generation Refers to what we would call F2 today (see p. 12, s. 3).
recessive = recessiven See p. 10, s. 14.
constant = constantes See p. 5, s. 5.