Which of the following accurately describes the patterns of inheritance in human blood types? a. two alleles code for blood types and four phenotypes are possible. b. three alleles code for blood types and three phenotypes are possible. c. allele i is dominant over alleles ia and ib.(others are saying this is correct) d. allele ia and ib are codominant, and allele i is recessive.(but i have a feeling this one is but i dont know)