ANT101H5 Lecture Notes - Lecture 4: Carl Linnaeus, Gene Flow, Melanin
Document Summary
Count de buffon varieties of the human species (1749) Goal was for the betterment of the human species by the selective breeding for favorable traits. Restriction of the propagation of undesirable heritable traits. Encouragement of breeding between individuals with desirable genetic traits. Polymorphism-a species with alternative forms (alleles) of particular genes. Polytypism - the study of differences between groups. Polymorphic species is divided into geographically dispersed populations. The expression on genetic variants in different frequencies in different populations of a species. Examinations of biological differences among human groups. Biological differences among human groups to reinforce social divisions. Suggested that they existed since middle pleistocene. Bringing together of darwinian natural selection & mendelian genetics. Human diversity a result of microevolutionary forces acting on human gene pool. Traits that differ in expression between populations & individuals. Larger surface area dissipates the most heat. Increased rbc production (in moderate altitude: ultraviolet light. Increased melanin production with greater sunlight exposure: infectious disease.
