Phenotypic Ratio in Incomplete Dominance

In an experiment examining the genetic traits of a population of fruit flies (Drosophila melanogaster), a researcher focuses on a specific trait controlled by a pair of alleles: wing shape. The trait exhibits incomplete dominance, where the homozygous dominant (AA) flies have smooth wings, the homozygous recessive (aa) flies have crinkled wings, and the heterozygous (Aa) flies display a phenotype of wavy wings. After performing a cross between two heterozygous individuals (Aa x Aa), the researcher observes the offspring. Based on this inheritance pattern, determine the expected phenotypic ratio of the offspring in this cross.