1. An individual is heterozygous for 2 genes.
How many different types of gametes can this person produce & in what proportions?
2. Brown eyes (B) are fully dominant over blue eyes (b).
a. A 3:1 phenotypic ratio of F1 progeny indicates that the parents are of what genotype?
b. A 1:1 phenotypic ratio of F1 progeny indicates that the parents are of what genotype?
3. Sickle cell anemia (SCA) is an autosomal recessive genetic condition. A couple plans to marry & wants to know the probability that they will have a child affected by SCA. With your knowledge of Mendelian inheritance, what can you tell this couple if:
a. both are unaffected, but each has one affected parent & one unaffected, not a carrier parent.
b. the man is affected & the woman is unaffected & both her parents are unaffected, not carriers.
4. A man with blood A and a woman with blood type B have 3 children:
a daughter with blood AB
a son with blood type B
another son with blood type O
What are the genotypes of the parents?