1. What conclusions can you make from this:
Parents
Black x White
F1 generation
All black
F2 generation
75% black
25% white
Which trait is dominant?
What are the genotypes of the F1 generation?
What are the possible genotypes of the F2 generation?

2. What is the phenotype of each possibility in the squares above?
RY Ry rY ry RY Ry rY ry
RRYY RRYy RrYY RrYy
RRYy RRyy RrYy RRyy
RrYY RrYy rrYY rrYy
RrYy Rryy rrYy rryy
What is the phenotype of each possibility in the squares above?
R = Round r = Wrinkled Y=Yellow y = Green

3. What conclusions can you make from this:
Parents
Black x White
F1 generation
All Grey
F2 generation
25% White
50% Grey
25% Black
Which trait is dominant?
What are the genotypes of the F1 generation?
What are the possible genotypes of the F2 generation?

4. Draw a pedigree using the following information
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!

5. 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?

6. Individual in II 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:
List the possible genotypes of the second (II) generation. (Hint: Copy the table below to help)
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)
Individual in II Generation
Genotype 1 2 3 4 5 6