Final answer:
The most abundant phenotype in the progeny of a three-point cross depends on the specific genes and their dominance relationships.
Step-by-step explanation:
The most abundant phenotype in the progeny of a three-point cross depends on the arrangement of the alleles and the dominance relationships among them. In a three-point cross, three different genes are studied simultaneously, and their phenotypes are observed in the offspring. The phenotypic ratios in three-point crosses can vary depending on the specific genes involved, and it is not possible to generalize the most abundant phenotype without specific information about the genes and their dominance relationships.