Phenotypically similar traits due to environmental factors are called
Phenocopy describes environmentally induced phenotype that mimics genetically determined trait without change in genotype. Exposure to teratogenic drugs, temperature shift, nutritional deficiency, or chemical during critical developmental window can alter morphogenetic pathway producing trait similar to mutant. Resulting individuals are genetically wild type and offspring revert to normal when environment normalized, demonstrating non-heritability. Distinguishing phenocopies from true genetic mutants and from genocopies where different genotypes produce similar phenotype through genetic heterogeneity is essential for diagnosis, risk counseling, and accurate experimental genetic analysis.
Ref: NCBI Bookshelf, Human Genetics: Environmental Effects, Phenocopy vs Genocopy Concept