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NAME ___________________________ AP Biology: CHAPTER 14- MENDEL AND THE GENE IDEA Watch the video to Review Punnett Squares https://www.youtube.com/watch?v=Y1PCwxUDTl8 https://www.youtube.com/watch?v=NWqgZUnJdAY Complete Genetics Practice 1: Basic Mendelian Genetics 1. List a few of the advantages of Mendel’s choice of the garden pea as a model organism. _____________________________________________________________________ _____________________________________________________________________ 2. Use the diagram to label the generations: P, F1, F2, pure, hybrid, and make notes of Mendel’s observations. 3. Using the diagram in Question 3, describe how the Law of Segregation applies to the F1 and to the F2 generations. _____________________________________________________________________ _____________________________________________________________________ 4. When does the segregation of alleles occur? __________________________________ 5. What is the difference between an allele and a gene? a. allele _______________________________________________________________ b. gene _______________________________________________________________ 6. Briefly define the following terms: a. homozygous __________________________________________________________ b. heterozygous _________________________________________________________ c. phenotype ____________________________________________________________ d. genotype ____________________________________________________________ 7. What is the purpose of a test cross? ________________________________________ _____________________________________________________________________ 8. When two traits are on different (non-homologous) chromosomes, how are they inherited? _____________________________________________________________________ 9. Describe and give an example of incomplete dominance. ________________________ _____________________________________________________________________ _____________________________________________________________________ 10. How does codominance compare to incomplete dominance? ______________________ _____________________________________________________________________ _____________________________________________________________________ 11. How is blood type an example of multiple alleles? _____________________________ _____________________________________________________________________ _____________________________________________________________________ 12. Define and give an example of pleiotropy. ____________________________________ _____________________________________________________________________ 13. Define and give an example of epistasis. _____________________________________ _____________________________________________________________________ 14. What is observed when traits are polygenic? _________________________________ _____________________________________________________________________ 15. The expression of phenotypes is often a result of both “Nature and Nurture”. Explain what that means _____________________________________________________________________ _____________________________________________________________________ 16. Briefly describe each of the following genetic disorders: a. Cystic fibrosis ________________________________________________________ _____________________________________________________________________ b. Tay-Sachs ___________________________________________________________ _____________________________________________________________________ c. Sickle cell anemia ______________________________________________________ _____________________________________________________________________ d. Achondroplasia ________________________________________________________ _____________________________________________________________________ e. Huntington’s disease ___________________________________________________ _____________________________________________________________________ Watch Bozeman video on Virtual Fruit Fly Lab https://www.youtube.com/watch?v=p9MpMr8qAAQ&feature=youtu.be Virtual Fruit Fly Lab : Get direction sheet and complete h ttp://www.sciencecourseware.org/vcise/drosophila/ Modified from: Reading guide by Lynn Miriello