Question

multiple choice question
evolutionary change is not caused by phenotypic variation if the phenotypic variation lacks which of the following?
heterozygosity
exon shuffling
natural selection
genetic basis

Explanation:

Evolutionary change is driven by genetic - based variation. Phenotypic variation without a genetic basis is not heritable and cannot lead to evolutionary change. Heterozygosity is a measure of genetic variation at a locus. Exon shuffling is a mechanism of genetic recombination. Natural selection acts on phenotypes with a genetic basis. So, lack of a genetic basis means phenotypic variation cannot cause evolutionary change.

Answer:

Genetic basis