Questions 1 Is the trait represented dominant or
- Slides: 6
Questions: 1. Is the trait represented dominant or recessive? 2. Explain how you know it is dominant/recessive? 3. What are the genotypes of #6, #7, and #8? 4. If #6 and #7 had another child, what chance do they have of having a child with the trait?
RY Ry r. Y ry RY RRYy Rr. YY Rr. Yy Ry RRYy RRyy Rr. Yy RRyy r. Y Rr. Yy rr. YY rr. Yy ry Rr. Yy Rryy rr. Yy rryy What is the phenotype of each possibility in the squares above? R = Round r = Wrinkled Y=Yellow y = Green
What conclusions can you make from this: Parents Black x White F 1 generation All black F 2 generation 75% black 25% white Which trait is dominant? What are the genotypes of the F 1 generation? What are the possible genotypes of the F 2 generation?
The ability to roll your tongue is determined by the dominant gene (T). In the following pedigree, affected individuals CAN roll their tongue. Use the pedigree in answer the following questions. 1 2 3 4 5 6 T = can roll tongue t = can NOT roll tongue Questions: 1. List the possible genotypes of the second (II) generation. (Hint: Copy the table below to help) Individual in II Generation Genotype 1 2 3 4 5 6 2. If individual #1 and individual #5 had a child, what are the chances it would have the ability to roll its tongue? (Hint: make a Punnett square)
What conclusions can you make from this: Parents Black x White F 1 generation All Grey F 2 generation 25% White 50% Grey 25% Black Which trait is dominant? What are the genotypes of the F 1 generation? What are the possible genotypes of the F 2 generation?
Draw a pedigree using the following information. Make sure to label each individual’s name with their symbol and mark the generations on the side: Wesley married Cassie and had three children (Matthew, Mark, and Maria). When Mark was a toddler, he was diagnosed with colorblindness. Once he got older, Mark married Jessica and had two children (Wes and Jake). Both Jake and Wes are color blind. Jake gets married to Jennifer and they have one child who is color blind (Mary). Mark’s sister, Maria got married to Tony and had four children (Joe, Kevin, Sarah, and Jamie). Kevin is colorblind. Sarah gets married to Adam and has two children (Max and Connor). Connor is color blind. Colorblindness is a sex-linked trait! Make sure to use the proper symbols!
