Assertion: mutation's gene | /r/CapableOf | aﬀecte same trait
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Source sentences:
text: The genes for tongue rolling and non-rolling are “different genes” in one sense, but only variations of the same kind of gene—aﬀecting the same trait, found in corresponding positions (loci) on homologous chromosomes, pairing up in meiosis, and turned on and oﬀ by the same regulators.