Wild-type bcd tagged with Tag:HA is expressed under the control of its own promoter and enhancer. bcd 3' UTR sequences are also present.
embryonic abdominal segment 4
embryonic abdominal segment 5
Females carrying bcdZ.T:Ivir\HA1 generally produce embryos with normal heads. Embryonic defects are usually restricted to the abdominal region, most often with fused or deformed A4 and/or A5 segments.