Chapter 11 WS - Name_Date_Period_...

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Name _____________________________________________ Date _______ Period ____ C HAPTER  11- T HE  E VOLUTION   OF  P OPULATIONS On an attached sheet of paper, define all of the vocabulary words for Chapter 11. A list of the words  can be found on page 355.  Section 11.1- Genetic Variation within Populations 1. Why does genetic variation increase the chance that some individuals in a population will  survive? 2. How would you calculate the allele frequencies of a population? Section 11.2- Natural Selection in Populations 1. Draw and describe a normal distribution curve.  2. The observable change in the allele frequencies of a population over time is called  ____________________.  3. Natural Selection can change the distribution of a trait along one of three paths: directional,  stabilizing, or disruptive. Draw and describe a graph for each type of selection.  4. The spines of a sea urchin population’s members vary in length. The short-spined sea 
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This note was uploaded on 04/05/2011 for the course BIOL 2112 taught by Professor Deidra during the Spring '11 term at CSU Sacramento.

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Chapter 11 WS - Name_Date_Period_...

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