• Phenocopy:
• First coined by Richard Goldschmidt in 1935:
• phenocopy is an environmentally induced phenotypic variation that closely resembles (mimics) the phenotype classically produced by a specific mutant genotype, but is itself non-heritable because the organism's genome remains unaltered.
• Example: Phocomelia (limb reduction) induced by prenatal thalidomide exposure phenocopies genetic phocomelia.
• nalysis:
• (Variation in phenotype caused by environmental condition): Correct.

Correct option: (1) Variation in phenotype caused by environmental condition