Polytene chromosomes normal.
dppH37/Df(2L)DTD2 embryos fail to form an amnioserosa.
Ventralized embryos: rings or patches of ventral denticles along dorsoventral axis. Disruption of germ band extension that leads to the invagination of posterior segments into the interior of the embryo.
Fail to complete germ band extension, die with strong ventralized phenotype and no dorsal derived epidermis.
Homozygotes have a ventralized embryonic phenotype: normally ventral epidermal pattern elements are present ventrally and dorsally.
Mutant phenotype rescued by P element mediated transformation of a wild type copy of dpp.
Allele class: Hin