Patterns of Inheritance Practice You are a geneticists applying for a employment by a prestigious university. The first task you have been given is to determine the inheritance pattern of a plant that produces beautiful flowers. These flowers can be red, yellow or orange. You have been given the following data to work with: A purebred plant with red flowers was crossed with a purebred plant with yellow flowers. The F1 were plants orange flowers. When allowed to self-pollinate, the plants with orange flowers produced 182 plants with orange flowers, 61 plants with yellow flowers, and 77 plants with red flowers. Analyze the data. Identify an inheritance pattern. Determine if the data support your hypothesis by conducting a chi-square statistical analysis test. Predicted Inheritance Pattern______________________________________________________________ Null Hypothesis________________________________ Show your work: X2____________________________________ df____________________________________ cv_____________________________________ Conclusion (Accept/Reject & why)_____________________________________________________________________________ A human female "carrier" who is heterozygous for the recessive, sex-linked trait causing hemophilia marries a normal male. What proportion of their male progeny will be hemophiliac? Show your work by completing the following: Define the alleles: State the Parent Genotypes: Complete the Punnett Square: Answer the Question:_______________________________________________ The pedigree to the right shows a family’s pedigree for Hitchhiker’s Thumb. Is this trait dominant or recessive? _______________________ How do you know? _________________________ ___________________________________________ I 1 2 1 2 II How are individuals III-1 and III-2 related? ________________________ How would you name the 2 individuals that have hitchhiker’s thumb? ___________________ 3 4 III 1 2 3 IV Name the 2 individuals that were carriers of hitchhiker’s thumb. ______________ 1 2 3 Is it possible for individual IV-2 to be a carrier? ___________ Why? ________________________________________ 4