Final answer:
In a three-point mapping experiment, one would expect 8 different genotypic classes due to the various combinations of parental and recombinant alleles.
Step-by-step explanation:
In a typical three-point mapping experiment, which is designed to determine the order of and distance between three linked genes, one would expect 8 different genotypic classes. These are produced from the various combinations of parental and recombinant alleles. The classes include one parental class with the original combination of alleles, one reciprocal parental class with the opposite combination, and six recombinant classes involving various crossovers between the three genes under consideration. The potential combinations are derived from the heterozygous parent in a test cross with a homozygous recessive individual.
Therefore, the correct answer is c) 8.