Cell lineage analysis of kynurenine producing organs inDrosophila melanogaster

SUMMARY Six hundred and ten gynandromorphs were produced in which an X chromosome loss uncovered the vermilion mutation. The mosaic patterns observed indicate that wild type ocelli are incapable of kynurenine production and that, in addition to the eyes, postembryonic kynurenine producing cells originate from two separate regions of the blastoderm. The positions of these regions on the genetic fate map of Drosophila melanogaster correspond to the embryonic precursors which give rise to the kynurenine producing cells of the larval fat body and Malpighian tubes.