Some general molecular mechanisms underlying development are described
. Namely: those involved in the differentiation of the R7 receptor in
Drosophila embryonic retina; those involved in the determination of em
bryonic axes and in polar cell differentiation, in Drosophila; those i
nvolved in the determination of the AB and P cell lineage and in vulva
differentiation in Caenorhabditis embryos. (C) 1996 Academic Press Li
mited