3. Dürfen die Hybriden und ihre Nachkommen in den aufeinander folgenden Generationen keine merkliche Störung in der Fruchtbarkeit erleiden.
3. Hybrids and their descendants should suffer no noticeable disturbance in their fertility in successive generations
generation = Generation See p. 3, s. 8.
disturbance = Störung Störung is a term Mendel uses on several occasions to address factors that might lead to deviations in observations, like in this case, lowered fertility, or as he discusses further below, cross fertilisation (p. 6, s. 2), or interference by insects (p. 9, s. 7; p. 10, s. 7). However, he also uses it in a more general, quasi-statistical sense for sources of error (p. 34, s. 11). Störung usually refers to deviations caused by external factors, but may also apply to diseases, especially mental diseases; see Jacob and Wilhelm Grimm, Deutsches Wörterbuch, online-edition, s.v. “stoerung” (1914).