Final answer:
A geneticist would classify a progeny resulting from a double crossover event between two adjacent marker genes during a three-point cross as a recombinant progeny.
Step-by-step explanation:
A geneticist would classify a progeny resulting from a double crossover event between two adjacent marker genes during a three-point cross as a recombinant progeny. In this type of cross, the genes on the same chromosome undergo a double crossover and exchange genetic material, leading to the formation of new combinations of alleles. This results in progeny that have genotypes different from their parental genotypes.