Introduction to Pedigrees: A Genetics Lab Exercise, Study Guides, Projects, Research of Genetics

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Name ___________________________________________________ Date _______________ Introduction to Pedigrees (25 point lab) Symbols:

1. Draw a pedigree that represents Mary married to Greg, with 2 sons (Scott and Tyler) and 1 daughter (Karen). Please label the pedigree with the names of the people.
2. Draw a pedigree that represents Mary married to Greg, with 2 sons and 1 daughter. Their son, Scott, married April and had Sutton (a boy) and Kendall (a girl). Their daughter, Karen, married Harry and had Eliq (a son) and Tariq (a son). Please label the pedigree with the names of the people.
3. Now you must make a pedigree chart from the descriptions given. Label the pedigree with the names of the individuals. a. Chad and Veronica got married and had Brittany, Kristin, and Harry. It was discovered that Harry had albinism. Brittany married Larry and had Stephan and Stephanie. Stephan also had albinism. Larry’s brother Barry also had albinism, but neither of their parents had the disorder. Draw a pedigree:

6. The pedigree above shows the passing on of colorblindness. What sex can ONLY be carriers of colorblindness? _________________________________
7. Is it possible for individual IV-2 to be a carrier? __________ Why?___________________________

8. With this in mind, what kind of non-mendelian trait is colorblindness? ______________________
9. Why does individual IV-7 have colorblindness? _________________________________________
10. Why do all the daughters in generation II carry the colorblind gene? _________________________
11. Name 2 IV generation colorblind males. _________ = Colorblindness I II III IV 1 2 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8