ANTH 101 Study Guide - Midterm Guide: Genetic Drift, Disruptive Selection, Macroevolution
Document Summary
Week 4 study questions: define evolution from a biological perspective. Evolution is the change in allele frequency over time. Be able to describe each and identify examples of all the different evolutionary forces. Natural selection is the primary mechanism for evolutionary change. Natural selection operates on the level of the individual. Stabilizing selection favors the most common traits in a population; directional selection favors individuals who are most fit for an environment based on environmental pressures, and disruptive selection favors the extreme traits in a population. Discuss the different types, significance, and what determines whether a conversion is good, bad, or neutral. A permanent change in the dna can be passed down if it occurs in the gametes. Point mutations -erroneous placement of one codon, including (substitution mutations- substituting one base for another, deletion or insertion of the codon, frameshift- shifting of the reading frame of the sequence.
