L48 Anthro 150A Lecture Notes - Lecture 6: Sickle-Cell Disease, Rh Blood Group System, Zygosity
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09. 09. 09 their population and those traits get passed on at a higher rate. ~if mutations occurs in non-coding part of dna (introns), then they won"t show in phenotypes. ~specific to an environment strategies that work in some environments don"t work in others natural selection evolution is a change in gene frequency over time. Mutations errors or mistakes in dna replication or meiosis that produce new sequences of dna. *if mutations occur in sex cells or happen early enough in embryology and end up occurring in all of the cells, they will make you different from your parents. *mutation is the source for variation that natural selection can work on. *all of us have 100-200 mutations, making us different from our parents. *most mutations are silent mutations: don"t have much effect. Genetic drift random/chance changes in gene frequency over time. *population differences in humans are due to chance.
