develops from ends during starts during blastomere D1.2 blastomere D1.2.1 XAO:0005098 Blastomere which lies lateral to blastomere D1.1.1 and is in the first tier of blastomeres. It contributes to a variety of tissues and organs, including the cement gland, head epidermis, olfactory epithelium, lens, cranial ganglia, otic vesicle, epidermis, tail fin, neural crest, retina, hindbrain, spinal cord, pharyngeal arches, caudal notochord and hindgut. xenopus_anatomy A2 2016-08-16T20:28:11Z D1.2.1 eriksegerdell dorsal animal hemisphere blastomere NF stage 6 (32-cell)