BIOL 3040 Chapter : Chapter 3
Document Summary
List and describe the three conditions necessary for natural selection to occur within a population: 1. Is there variation within the population: human height : refer to line graph. It has been observed that human populations have been getting taller over the past few decades: height is influenced by a number of factors: environment, nutrition, etc, 2. Is height heritable: height is a heritable trait. Does being taller (or shorter) affect an individual"s ability to survive or reproduce (differential reproductive success): study showing the reproduction for the west point men graduating class of. 1950: the last quarter percentile (75% - tallest man) had the most children, the components of natural selection with these three ingredients natural selection will occur, variation. Inheritance: differential reproductive success, the process of natural selection : refer to bird and beetle, variation. Members of the population vary in the traits they display. Offspring tend to resemble their parents: differential reproductive success.