What is a primary strategy to resolve the environmental complication in phenotype prediction?

• A. Increase sample size
• B. Reduce the differences in phenotypes due to the environment
• C. Ignore environmental effects
• D. Change the genetic base

Answer: (B)

Environmental variation can obscure how genotype translates into phenotype, making predictions noisy. The best way to address this is to reduce how much environment drives phenotypic differences, by standardizing growing conditions and by designing experiments that separate environmental effects from genetic ones. In practice, this means using replicated, randomized trials and, when possible, multi-environment data analyzed with models that partition out environmental variation (for example, including environment as a covariate or using reaction-norm/GxE models). This approach isolates the genetic signal that is consistent across environments, improving phenotype prediction. Increasing sample size helps precision but doesn’t remove environmental influence; ignoring environmental effects leaves important variation unaccounted for; changing the genetic base is a longer-term strategy that doesn’t directly resolve the environmental complication in prediction.