BIOL 1001 Chapter Notes - Chapter 4: Growth Medium, Null Hypothesis, Richard Lenski
Document Summary
Biol 1001 symbiosis lecture week 2 (january 18 22) Evolution can be defined as a change in allele frequencies: evolutionary changes occur in populations, population group of individuals from the same species that live in same area and interbreed. Two fundamental messages: natural selection is not the only agent responsible for evolution, each of the four evolutionary processes has different consequences. Section 4. 1 analyzing change in allele frequencies: hardy-weinberg principle. Gene pool concept (e. g. clams, sea stars etc. : to analyze consequences of mating among all of the individuals in a population, they invented the gene pool concept. They had to calculate what happened when two gametes were plucked at random and each of these pairs was then combined to form offspring. Mutation an evolutionary mechanism that increases genetic diversity in a population. Mutation occurs when dna polymerase makes an error as it copies a dna molecule, resulting in a change in the sequence of deoxyribonucleotides or at a chromosomal level.
