Standard 7a Preknowledge
7a) Students know why natural selection acts on the phenotype rather than the genotype of an organism.
CALIFORNIA FRAMEWORKS SUMMARY:
Natural selection works directly on the expression or appearance of an inherited trait, the phenotype, rather than on the gene combination that produces that trait, the genotype. The influence of a dominant allele for a trait over a recessive one in the genotype determines the resulting phenotype on which natural selection acts.