Assertion: genotype's allele | /r/CapableOf | produce insufficient gene product
Facets:
value: for any function of the gene
type: PURPOSE
value: rarely
type: TEMPORAL
Source sentences:
text: Rarely, a single functional allele in the heterozygote may produce insufficient gene product for any function of the gene, and the phenotype resembles that of the homozygote for the non-functional allele.