"Phenotypic consequences" refers to the physical or observable outcomes or effects that result from certain genetic or environmental factors on an organism's traits or characteristics. Full definition
Although phenotypic consequences, referred to here as biallelic effects, resulting from two different mutant alleles in compound heterozygote patients have been postulated, such effects have historically been difficult to distinguish from the influence of environment and genetic background. (journals.plos.org)
Subtle alterations of the regulatory network can produce dramatic phenotypic consequences. (bcchr.ca)