BIOL 1202 : BIOL 1202 Notes Exam 1
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Developed the theory independently: change over time of the genetic composition of a population, descent of modern organisms with modification from preexisting organisms. Accumulation of inherited characteristics that enhance organisms" ability to survive in specific environments. Bodies of living organisms are modified through the use or disuse of parts. The smallest unit of evolution: one common misconception about evolution is that individual organisms evolve during their lifetime, evolutionary processes (e. g. , natural selection) acts on individuals, but populations evolve. Point mutation: change in one nucleotide base in a gene. Chromosomal mutations: delete, disrupt, or rearrange many loci in a chromosome. Gene duplications: duplication of whole segments of a chromosome. Mutation rate averages 1 in every 100,000 genes per generation. In sexually reproducing organisms, sexual recombination produces most of the variability in each generation. (crossing over, independent assortment) Concept 23. 2 the hardy-weinberg equation can be used to test whether a population is evolving.
