Genetics Worksheet SCI/230 Version 7: Punnett Square
Genetics Worksheet SCI/230 Version 7 1 Associate Program Material Genetics Worksheet Review the images below and answer the follow-up questions. Key: Pedigree showing inheritance of cystic fibrosis male affected with cystic fibrosis unaffected male Generation female affected with cystic fibrosis unaffected female I II III IV A Pedigree showing Inheritance of Huntington’s Disease V Questions: Key: male with Huntington’s Disease unaffected male Generation 1. According to the pedigree, is cystic fibrosis inherited as a dominant oremalerecessive trait? f as a with Huntington’s Disease Explain how you made your conclusion using evidence from the pedigree and the principles of genetics. unaffected female I 2. What would a Punnett square that shows how the son in generation IV (marked with an A) inherited cystic fibrosis look like? II III IV V Genetics Worksheet SCI/230 Version 7 2 Key: Pedigree showing inheritance of Huntington’s disease male with Huntington’s disease unaffected male Generation female with Huntington’s disease unaffected female I B II III IV V Questions: 1. According to the pedigree, is Huntington’s disease inherited as a dominant or as a recessive trait? Explain how you made your conclusion using evidence from the pedigree and the principles of genetics. Key: Pedigree showing Inheritance of Huntington’s Disease 2. What would a Punnett square that shows how the first daughter in generation IIHuntington’s Disease male with (marked with a B) did not inherit Huntington’s disease look like? unaffected male 3. What is the role of chromosomes in the inheritance of genetic traits, such as cystic fibrosis Generation and Huntington’s disease? female with Huntington’s Disease I II III IV V unaffected female