The genetic identification of a heterochromatic segment on the X chromosome of Drosophila melanogaster.
An autosomal euchromatic maternal-effect mutant, abo (= abnormal oocyte), interacts with, or regulates the activity of, the heterochromatin of the sex chromosomes of Drosophila melanogaster. It is shown that this interaction or regulation with the X chromosome involves a specific heterochromatic locus or small region that maps to the distal penultimate one-eighth of the basal X-chromosome heterochromatic segment.
D000818:Animals; D002874:Chromosome Mapping; D003433:Crosses, Genetic; D004331:Drosophila melanogaster; D005260:Female; D006570:Heterochromatin; D008297:Male; D009154:Mutation; D012730:Sex Chromosomes
D006570:Heterochromatin