Name Class Date BUILD Understanding Concept Map A concept map helps you see how the topics you read about are related to one another. Use the words and phrases below to fill in the empty spaces in the concept map. 252 Genetic recombination Genes Chromosomes Crossing-over Epidemic Viruses, including flu viruses, have genes. The genes determine the viruses’ traits. What traits might make some viruses better at causing disease than other viruses are? Write your ideas in the space below. CHAPTER MYSTERY Sources of Genetic Variation include Mutations involve changes in happens during Lateral gene transfer Meiosis
Name Class Date Single-Gene and Polygenic Traits Polygenic Traits Some traits are controlled by only one gene. They are called single-gene traits. Other traits are controlled by two or more genes. They are called polygenic traits. Human height is an example of a polygenic trait. Follow the directions. 1. Draw one bar for each height range. The bar should show how many students have heights in that range. 2. Draw a curve connecting the tops of the bars. Answer the questions. 3. Circle the correct answer. What shape is the curve you drew? bell curve one-sided curve irregular curve 4. What is the average height for this population? A. 155–164 cm B. 165–174 cm C. 170–179 cm D. 185–194 cm 5. Jane and Miguel are both 172 cm tall. Does that mean they have the same genotype? Why? 253 Height in cm Number of Students 155–159 1 160–164 2 165–169 6 170–174 10 175–179 10 180–184 6 185-189 2 190–194 1
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- Fall '16
- Robert Hassell
- Genetics, Polygenic Traits