Worksheet Chapter 11: Inheritance

1. True or False: A test cross is performed by crossing an individual displaying a dominant phenotype with a homozygous dominant individual.

2. Fill in the blank: Mendel's First Law states that two alleles for a trait segregate during gamete formation; this is also known as the Law of ________.

3. Explain why sex-linked disorders like haemophilia occur more frequently in human males than in females.

4. True or False: Human males inherit their sex-linked recessive conditions on the X chromosome exclusively from their mothers.

5. State the difference between phenotype and genotype.

6. Describe Mendel's Law of Independent Assortment and state the condition under which it applies.

7. A carrier woman for color blindness ($X^C X^c$) marries a normal vision man ($X^C Y$). Determine the expected percentage of their sons who will be color blind.

8. A father has blood type A ($I^A i$) and a mother has blood type B ($I^B i$). Show all possible genotypes and phenotypes of their potential children using a genetic cross.

9. What is the expected phenotypic ratio in the F2 generation of a dihybrid cross between two individuals heterozygous for both traits (RrYy x RrYy)?

10. Explain why a person with blood type AB expresses both antigen A and antigen B on their red blood cells.