Homozygous embryos exhibit defects in posterior pattern.
Class 1 allele: Unrescued embryos (lacking maternal and zygotic phl activity) fail to differentiate into structured embryos and degenerate around 7 hrs of development. Rescued embryos (carrying wild type phl from their father) miss most structures posterior to abdominal segment 6 or 7 and anteriorly a portion of the cephalopharyngeal skeleton, labral sense organ and medial tooth are deleted. fkh expression (in wild type evident in hindgut, Malpighian tubule(s) and anal pads) entirely absent from class 1 embryos. Expression of tll, hkb, hb, fkh absent from both rescued and unrescued embryos, 7th ftz stripe deleted and 6th ftz stripe variably deleted/expanded. Conclude from 0% to 20--25% EL of blastoderm embryos deleted in class 1 alleles.
Raf107 has partially lethal phenotype, suppressible by rlSem/rl+
Reduced viability is dominantly suppressed by rlSem.
Injection of wild type RNA rescues the filzkorper, tuft and anal pads.
J.M. Dura.
Comparison of homozygotes for this allele with heterozygotes for this allele and Df(1)64c18 (deleted for phl) is the basis for amorph designation.