LIFESCI 1 Lecture Notes - Lecture 3: Asexual Reproduction, Antibiotics, Base Pair
Document Summary
Graph on artificial selection: correction (oil content of corn: generation and oil content are mislabeled. How do we know if a population is evolving: microevolution: change in allele frequencies or genotype frequencies over time, then evolution has occurred. Mechanisms of microevolution: natural selection, gene flow, mutation, genetic drift, assortative mating (non-random) Review mitosis/meiosis: don"t need to know all the stages necessarily, mitosis: parent cell (diploid (2 copies of all genetic material)) Diploid cell duplicated and divided in half, two diploid daughter cells identical to parent (essentially making photocopies) Muscle cells, blood cells, skin cells: meiosis: 4 haploid cells formed (gametes) from two diploid parent cells. Each daughter cell is unique, different from parent cells. Each person has two alleles for one gene. Each gene can be passed on independently of other genes. Hardy weinberg equilibrium: population is not evolving: hardy weinberg is null hypothesis (no change) Hardy weinberg equilibrium: assumption 1: no natural selection.
