Question

what pattern of inheritance results in a blending of two alleles? single allele expression incomplete dominance complete dominance

Explanation:

Incomplete dominance is a pattern where neither allele is completely dominant. Instead, the phenotype of the heterozygote is a blend of the phenotypes of the two homozygotes. For example, in snapdragons, a red - flowered plant (RR) and a white - flowered plant (rr) can produce pink - flowered (Rr) offspring. Single allele expression is not a standard inheritance pattern term in this context. Complete dominance is when one allele completely masks the effect of the other allele (e.g., in pea plants, the allele for purple flowers (P) is completely dominant over the allele for white flowers (p), so Pp plants have purple flowers).

Answer:

incomplete dominance