BIOLOGY 1114 Lecture Notes - Lecture 6: William Bateson, Gregor Mendel, Mutation Rate

• School: Ohio State University
• Department: Biology
• Course: BIOLOGY 1114
• Professor: All

Document Summary

A species in one environment has broad leaves, but thin leaves in a different environment. What can explain this difference: both environmental and genetic differences, it is very rarely one or the other (almost always a combination of both) Most would be on a sliding scale, though. Transmission of genetic signal: darwin lacked a mechanism of heredity, gregor mendel: Favored pangenesis (all cell lines contribute to gametes) Influenced by darwin"s work on plant and animal domestication. Was publishing at about the same time as darwin. Unfortunately, darwin didn"t have his work (which he needed to prove natural selection: mendel"s contributions: Law of segregation: two members of a gene pair segregate randomly and independently into different gametes. Independent assortment: characteristics are inherited independently from each other. Organism can carry gene without expressing phenotype (heterozygote: blending vs mendelian: Phenotype may be intermediate, but genes do not blend . Blending: rare variants are blended out of the population.