{"knowledge_schema": {"broad_category": "Genetics \u2192 Heritability and Polygenic Traits", "refinement": "This problem involves understanding the concepts of broad-sense heritability, narrow-sense heritability, and the implications of polygenic scores in predicting traits.", "specific_scope": "The focus is on the relationship between heritability estimates and the predictive power of polygenic scores derived from GWAS data in a K-selected species under Hardy-Weinberg Equilibrium.", "goal": "Identify the correct statement regarding the limitations of polygenic scores in relation to heritability."}, "summary": "In this problem, we explore the relationship between broad-sense heritability and polygenic scores in predicting traits. Given that the broad-sense heritability is 0.5, the polygenic score, which is based on genetic data, cannot account for more than 50% of the trait's variance. This is because the polygenic score reflects the additive genetic variance, which is a component of the total heritability. Therefore, the correct statement is that the polygenic score cannot account for more than 50% of the trait's variance."}