I need assistance with assignment attached.

I need assistance with assignment attached.
Pedigree Worksheet Name ____________________________________ = Huntington’s Disease 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 are individuals III-2 and II-4 related? ________________________ I-2 and III-5? _________________________ 6. The pedigree to the right shows a family’s pedigree for Hitchhiker’s Thumb. Is this trait dominant or recessive? _______________________ I 1 2 7. How do you know? _________________________ ___________________________________________ II 8. How are individuals III-1 2 1 4 3 and III-2 related? ________________________ III 9. How would you name the 2 individuals that 4 3 2 1 have hitchhiker’s thumb? ___________________ IV 10. Name the 2 individuals that were 3 2 1 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 a family’s pedigree **half-shaded = carrier of disease I for colorblindness. Which sex can be carriers of colorblindness and not have it? ______________________ 13. With this in mind, what kind of trait is II colorblindness (use your notes)? ______________________ 14. Why does individual IV-7 have colorblindness? _________________________________________________ III 15. Why do all the daughters in generation II carry the colorblind gene? ____________________________________ IV 16. Name 2 IV generation colorblind males. _________ 8 7 6 5 4 1 2 3 Name ____________________________________ 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 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – I 1 2 3 4 5 6 II 1 2 3 4 5 6 7 8 9 III 1 2 3 4 5 6 7 8 Try to identify the genotypes of the following individuals using the pedigree above. (homozygous dominant, homozygous recessive, heterozygous) III-3: ___________________________________ II-1: ____________________________________ I-1: ____________________________________ II-4: ____________________________________ 1. Is this trait dominant or recessive? Explain your answer. _________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 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.