PLZ HELP I REALLY NEED HELP Which of the following genotypes for human blood type shows alleles that are codominant?

A. AO (or IAi)

B. AB (or I4IB)

C. BB (or IBIB)

D. AA (or IAIA)

Select the correct answer. tay-sachs disease is caused by a mutation in the hexa gene located on chromosome 15. tay-sachs follows an autosomal recessive pattern of inheritance. with the of the diagram, identify which of the offspring will be an unaffected carrier. a diagram showing the genes of parents who are carriers of tay-sachs disease a. a, b, and c b. b and c c. a and d d. a e. d