Pleiotropy and preadaptation in the evolution of human language capacity

摘要: The capacity for spoken language in the human is a genetic trait, but information communicated by this means to large extent culturally determined. Using gene-culture coevolutionary approach, we model hypothesis that speech evolved as channel communication of adaptive cultural traits from parent offspring. motivation paper condition obtained previously initial increase would require at least two-fold advantage transmitted trait. Here, show under reasonable assumptions invasion becomes less stringent. In Model 1, assume two can be transmitted. A gene which permits second 2, related function such greater memory prerequisite speech, and confers an independent its association with speech. both models haploid sexual genetics simple scheme vertical transmission. stability properties all corner edge equilibria are analyzed. taken together suggest possible scenario stages evolution