Construct: N-terminal deletion of amino acids 49-82. Removes 7 RS dipeptides from the short RS1 domain.
Female sex determining function: chromosomal XX tra- animals with one copy of the transgene are usually sterile females with occasional few malformed male or intersexual structures. Male fertility function: females mated to tra- males with one copy of the transgene give rise to 84.0 +/- 12.9% fertilized eggs.