STUDIES ON THE SAL LOCUS IN DROSOPHILA PSEUDOOBSCURA. II. MODES OF REGULATION OF THE SAL BANDING PATTERN

[摘要] From a consideration of genetic and chromosomal alterations which affect the banding pattern of a specific salivary chromosome region, it is concluded that (1) a regulator locus, sal , is closely linked with the region in question but separated from it spatially by a few bands; (2) either mutation of the sal locus or transfer of the region to a heterochromatic region affects the banding pattern similarly; and (3) the change probably consists of a compaction of DNA and a concomitant inactivation of genetic loci.

[学科分类] 医学（综合）