Assignment IX.8 Pedigree Worksheet.

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1. Which members of the family above are afflicted with Huntington’s Disease? Row 1: Male Row 2: 1 male 2 girls Row 3: 1 girl 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? Dominant 3. How many children did individuals I-1 and I-2 have? 8 4. How many girls did II-1 and II-2 have? 2 How many have Huntington’s Disease? 1 5. How is individual III-2 and II-4 related? II-4 is the ucle of III-2 I-2 and III-5? I-2 is grandma to 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? Recessive 7. How do you know? It doesn't show until the last generation 8. How are individuals III-1 and III-2 related? They’re brother and sister 9. Name 2 individuals that have hitchhiker’s thumb. IV-2 and IV-4 10. Name 2 individuals that were carriers of hitchhiker’s thumb. III-4 III-5 [Show More]

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