Sexual Selection Adaptations Adaptation Genetic Variation Genetic Drift Species Adaptation Behavioral Adaptations Genes Body Size Limitations Evolutionary Phenomena Genetic Traits Life History Theory Microbial Evolution Species Interaction Reproductive Strategies Survival Strategies Genetic Mutations Phenotypic Traits Genetic Inheritance Parasites Phenotypic Variation Randomness and Probability Dietary Adaptation Biological Adaptations Sensory Processing Human Evolution
Researchers report Quechua-speaking Peruvians carry about 10 copies of a saliva enzyme gene, the highest known in any population.