Abstract: | The staket strain carrying an electrophoretic variant of the minor chorion protein was used to determine the chromosomal location of the s70 gene. The gene was shown to locate within the Df(1)sta (1E1-2-2B3-4) and outside the Df(1)At127 (1E1-2-2A1-2). Therefore, the s70 chorion gene resides within the region 2A1-2-2B3-4 on the X-chromosome, i.e. outside the ecs locus. Female-sterile mutations of the ecs locus do not interfere with expression of the chorion gene. |