Genetics Pedigree Worksheet A pedigree is a chart of a person's ancestors that is used to...
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Genetics Pedigree Worksheet A pedigree is a chart of a person's ancestors that is used to analyze genetic inheritance of certain traits - especially diseases. The symbols used for a pedigree are: female, unaffected female, affected male, unaffected male, affected Siblings are placed in birth order from left to right and are labeled with numbers. Each generation is labeled with a Roman numeral. Example: we would name an individual II-3 if he/she was in the second generation and the 3rd child born 1 2 III 1 2 3 4 5 3 56 6 7 8 8 9 Try to identify the genotypes of the following individuals using the pedigree above. (homozygous dominant, homozygous recessive, heterozygous) III-3: . II-1: 1. Is this trait dominant or recessive? Explain your answer. . I-1: II-4: 2. How can you know for sure that individuals II-3 and II-4 are heterozygous? 3. Brown eyes are a dominant eye-color allele and blue eyes are recessive. A brown-eyed woman whose father had blue eyes and whose mother had brown eyes marries a brown-eyed man whose parents are also brown- eyed. They have a son who is blue-eyed. Please draw a pedigree showing all four grandparents, the two parents, and the son. Indicate which individuals you are certain of their genotype and where there are more than one possibilities. I = III 1 2 3 2 3 5 7 8 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 1-2 have? 4. How many girls did II-1 and II-2 have? 5. How are individuals III-2 and II-4 related? 6. The pedigree to the right shows a family's pedigree for Hitchhiker's Thumb. Is this trait dominant or recessive?_ 7. How do you know? How many have Huntington's Disease? 1-2 and III-5? 8. How are individuals III-1 and III-2 related? 9. How would you name the 2 individuals that III have hitchhiker's thumb? IV 10. Name the 2 individuals that were carriers of hitchhiker's thumb. II 2 3 = Huntington's Disease 11. Is it possible for individual IV-2 to be a carrier? 12. The pedigree to the right shows a family's pedigree for colorblindness. Which sex can be carriers of colorblindness and not have it? 13. With this in mind, what kind of trait is colorblindness (use your notes)?, 14. Why does individual IV-7 have colorblindness? 15. Why do all the daughters in generation II carry the colorblind gene? 16. Name 2 IV generation colorblind males. II III Why? O **half-shaded carrier of disease TO IV 1 2 3 4 5 6 7 8 Genetics Pedigree Worksheet A pedigree is a chart of a person's ancestors that is used to analyze genetic inheritance of certain traits - especially diseases. The symbols used for a pedigree are: female, unaffected female, affected male, unaffected male, affected Siblings are placed in birth order from left to right and are labeled with numbers. Each generation is labeled with a Roman numeral. Example: we would name an individual II-3 if he/she was in the second generation and the 3rd child born 1 2 III 1 2 3 4 5 3 56 6 7 8 8 9 Try to identify the genotypes of the following individuals using the pedigree above. (homozygous dominant, homozygous recessive, heterozygous) III-3: . II-1: 1. Is this trait dominant or recessive? Explain your answer. . I-1: II-4: 2. How can you know for sure that individuals II-3 and II-4 are heterozygous? 3. Brown eyes are a dominant eye-color allele and blue eyes are recessive. A brown-eyed woman whose father had blue eyes and whose mother had brown eyes marries a brown-eyed man whose parents are also brown- eyed. They have a son who is blue-eyed. Please draw a pedigree showing all four grandparents, the two parents, and the son. Indicate which individuals you are certain of their genotype and where there are more than one possibilities. I = III 1 2 3 2 3 5 7 8 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 1-2 have? 4. How many girls did II-1 and II-2 have? 5. How are individuals III-2 and II-4 related? 6. The pedigree to the right shows a family's pedigree for Hitchhiker's Thumb. Is this trait dominant or recessive?_ 7. How do you know? How many have Huntington's Disease? 1-2 and III-5? 8. How are individuals III-1 and III-2 related? 9. How would you name the 2 individuals that III have hitchhiker's thumb? IV 10. Name the 2 individuals that were carriers of hitchhiker's thumb. II 2 3 = Huntington's Disease 11. Is it possible for individual IV-2 to be a carrier? 12. The pedigree to the right shows a family's pedigree for colorblindness. Which sex can be carriers of colorblindness and not have it? 13. With this in mind, what kind of trait is colorblindness (use your notes)?, 14. Why does individual IV-7 have colorblindness? 15. Why do all the daughters in generation II carry the colorblind gene? 16. Name 2 IV generation colorblind males. II III Why? O **half-shaded carrier of disease TO IV 1 2 3 4 5 6 7 8
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Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
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