ANTHRO 7 Study Guide - Midterm Guide: Blending Inheritance, Punnett Square, Event Tree
Document Summary
Chapter 1 adaptation by natural selection: adaptation: a feature of an organism created by the process of natural selection. What is evolution: adaptations selected through time to change a group of organisms, change in gene frequency over time. A field study of natural selection: galapagos finches: by peter and rosemary grant on the galapagos islands on darwin"s finches, drought stuck that influenced seed availability. Directional vs stabilizing selection: directional increases mean, stabilizing reinforces mean. Stabilizing selection reduces the amount of variation in the population but does not alter the mean value of the trait. Evolutionary equilibrium and disequilibrium: equilibrium a steady state in which the composition of the population does not change, disequilibrium unsteady state. The discovery of genetics: needed to solve criticisms to darwin"s theory mendel. The blending problem: blending inheritance: a model of inheritance, widely accepted during the nineteenth century, in which the hereditary material of the mother and father was thought to combine irreversibly in the offspring.
