1. Genetics Test
Review

2. The allele for brown eye color is dominant over blue
The allele for brown eye color is dominant over blue. A brown-eyed woman (whose father had blue eyes) married a man with blue eyes (whose mother was brown-eyed). What genotypic and phenotypic ratios would you expect in their children?

3. Nystagmus is a condition in humans in which those affected have eyeballs that roll involuntarily. The genes for this trait are incompletely dominant. A normal man marries a woman who is slightly nystagmus. What is the chance that their children will be affected?

4. Juvenile muscular dystrophy is a recessive sex linked gene
Juvenile muscular dystrophy is a recessive sex linked gene. Most people with MD die by their early teens. A family has 5 children, 3 girls, ages 2, 4 and 5, and 2 boys, one boy is 6 months old and the other died of MD at age 14. What are the genotypes of the parents and the chance their kids will have MD?

5. A woman with blood type B marries a man. They have 3 kids
A woman with blood type B marries a man. They have 3 kids. One is type B, the other 2 are type O. What are the genotypes of everyone in the family?

6. Prince George has the genotype XNY and does not have hemophilia
Prince George has the genotype XNY and does not have hemophilia. His wife, Princess Margarite is also normal. The Prince and Princess have had a son die at the age of 3 of hemophilia.What is Princess Margarite's genotype? What are the chances that their future children will have hemophilia? Prove with a square!

7. A dominant gene is responsible for the gray body color of fruit flies: its recessive allele produces black body color. A dominant gene is responsible for the gray body color of fruit flies: its recessive allele produces black body color. A cross of a gray female with a black male produces 52 black and 58 gray flies. What are the genotypes of the parents?

8. In humans the size of mouth is codominant
In humans the size of mouth is codominant. There are 3 sizes, small, medium and large. Assign the symbols for the alleles and do the following crosses and tell the expected phenotypes.
small x medium
medium x large
What would the genotypes of the parents have to be so that the parents could have 3 children with different phenotypes?