are nematodes sexually dimorphic
Most nematodes are dioecious, but some are monoecious and a few parthenogenetic forms are known. Dioecious species exhibit sexual dimorphism with females being larger than males. Males have a curled tail and more external ornamentation such as bursae, alae, and papillae (the males have more jewelry).ematodes exhibit determinate cleavage and nematode development has been well studied. The fate of each blastomere is determined early during cleavage and this has allowed researchers to mark and map the fate of each cell to learn which tissues will develop from a given cell. This is illustrated in Figure 22.33.