1. Multiple Alleles
Practice Problems

2. Hair Color In humans, hair color is determined by multiple alleles
Black – B1 (B1B1, B1B2, B1B3, B1b)
Brown – B2 (B2B2, B2B3, B2b)
Blond – B3 (B3B3, B3b)
Red – b (bb)

3. Problem 1
A woman who has blond hair marries a man with red hair. All of their children have blond hair. What is the fathers genotype?

4. Problem 2 A man with a genotype B1B2 has what color hair?
A woman with genotype B2b has what color hair?
Do a cross to determine the possible phenotypic and genotypic ratios of their first child.

5. Eye Color In humans, eye color is determined by multiple alleles.
Brown – E1
Green – E2
Blue – E3
Red – e

6. Problem 1
What are the possible GENOTYPES for each eye color?

7. Problem 2
Cross a male homozygous for green eyes with a female whose genotype is E3e.

8. Blood Types In humans, blood type is determined by multiple alleles
What are the 4 blood types?
What are the 4 blood genotypes?