In peas, the allele for tall stems (T) is dominant to that for dwarf stems (t), and the allele for axial flowers (A) is dominant to that for terminal flowers (a). A plant of unknown genotype with tall stems and axial flowers is crossed with a plant with dwarf stems and terminal flowers. Among the offspring are 38 plants with tall stems and axial flowers, and 36 plants with tall stems and terminal flowers. What is the previously unknown genotype