Jitty Essay

290 WordsMar 5, 20132 Pages
Name ______________________________ Date ____________ Period _____________ Pedigree Worksheet I 1 2 II 1 2 4 5 3 6 7 8 III 1 2 3 4 5 1. Which members of the family above are afflicted with Huntington’s Disease? ____________________________ 2. There are no carriers for Huntington’s Disease- you either have it or you don’t. With this in mind, is Huntington’s disease caused by a dominant or recessive trait? ___________________ 3. How many children did individuals I-1 and I-2 have? ____________________________________________ 4. How many girls did II-1 and II-2 have? ___________ How many have Huntington’s Disease? ____________ 5. How is individual III-2 and II-4 related? _____________________ I-2 and III-5? _____________________ 6. The pedigree to the right shows the passing on of Hitchhiker’s Thumb in a family. Is this trait dominant or recessive? ____________________ 7. How do you know? ______________________ 8. How are individuals III-1 and III-2 related? ________________________ 9. Name 2 individuals that have hitchhiker’s thumb. __________________ 10. Name 2 individuals that were carriers of hitchhiker’s thumb. ______________ 11. Is it possible for individual IV-2 to be a carrier? __________ Why? __________________________________ 12. The pedigree to the right shows the passing on of colorblindness. What sex can ONLY be carriers of colorblindness? __________________________ 13. With this in mind, what kind of non-mendelian trait is colorblindness? ______________________ 14. Why does individual IV-7 have colorblindness? __________________________________________ 15. Why do all the daughters in generation II carry the colorblind gene?

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