1. Punnett squares can be used to depict crosses involving two factors, also
called_________
2. In incomplete dominance, a heterozygote has a/n __________ phenotype, mixing
both of its parents' phenotypes together.
3. Human blood type is an example of ________, where both the A and B blood
types can be expressed simultaneously.
4. People with one copy of the allele that causes sickle cell anemia are called
while people with two copies of the allele have the disease.