Final answer:
In triploids, the expected meiotic pairing configuration is Trivalent (C), with groups of three homologous chromosomes coming together during prophase I of meiosis.
Step-by-step explanation:
The expected meiotic pairing configuration in a triploid organism would be C) Trivalent. In triploids, such as a banana with an AAB genetic constitution, chromosomes are present in groups of three rather than pairs. At prophase I of meiosis, homologous chromosomes come together to form trivalents, which are associations of three homologous chromosomes. A tetrad, developed in diploid organisms during meiosis, consists of four chromatids from the pairing of two homologous chromosomes. However, in triploids, due to the presence of an extra set of chromosomes, the typical pairing is disturbed, making tetrads unlikely and trivalents the common structure, albeit resulting in often sterile offspring due to the complexities of meiosis in triploid organisms.