Final answer:
The least abundant phenotype in the progeny of a three point cross is the one that occurs in a small proportion of the offspring.
Step-by-step explanation:
The least abundant phenotype in the progeny of a three point cross can be determined by considering the genotypes and phenotypes of the individuals involved. In a three point cross, three different traits are being considered. The least abundant phenotype would be the one that only occurs in a small proportion of the offspring. For example, if we have three traits A, B, and C, and the dominant phenotype is observed for traits A and B, while the recessive phenotype is observed for trait C, the least abundant phenotype would be the recessive phenotype for trait C.