Damit ist zugleich erwiesen, dass das Verhalten je zweier differirender Merkmale in hybrider Verbindung unabhängig ist von den anderweitigen Unterschieden an den beiden Stammpflanzen.
At the same time this demonstrates, that the behaviour of two respective differing traits in hybrid conjunction is independent of any other differences in the two parental plants.
This sentence comes close to how geneticists today would informally formulate the “law of independent assortment”, although it does notably not make reference to any genetic factors. See commentary on previous sentence for further discussion.
behaviour = Verhalten Bateson has “relation” (perhaps misreading Verhalten as Verhältnis), we follow Sherwood’s more literal translation.
two respective differing traits = je zweier differirender Merkmale See p. 7, s. 3.
in hybrid conjunction = in hybrider Verbindung See p. 10, s. 14.