BIOL 1111 Chapter 18: Chapter 18

• School: University of Windsor
• Department: Biological Sciences
• Course: BIOL 1111
• Professor: Dora Cavallo

Document Summary

Microevolution: a change in frequencies of alleles of heritable phenotypic variants in a population over time. Population: includes all the individuals of a single species that live together in the same place and time. In some populations, individuals vary dramatically in appearance, but the members of most populations look pretty much alike. However even those that look alike, scubas the cerion snails in the gure, are not identical. With a scale and ruler, you could detect differences in their weight as weak as in the length and diameter of their shells. With suitable techniques, you could also document variations in their individual biochemistry, physiology, internal anatomy, and behaviour: all of these are examples of phenotypic variation, differences in appearance or function among individuals of a population. Darwin"s theory recognized the importance of heritable phenotypic variation. Most characters exhibit quantitative variation, individuals differ in small, incremental ways. We display this data in a bar graph or sometimes as a curve.