Assertion: gene's allele | /r/HasProperty | a gene variant
Facets:
Source sentences:
text: A null allele is a gene variant that lacks the gene's normal function because it either is not expressed, or the expressed protein is inactive.
text: The short answer is that an allele is a variant form of a gene.
text: Colloquial usage of the term gene may actually refer to an allele: a gene is the basic instruction—a sequence of nucleic acids, while an allele is one variant of that gene.