Position-effect variegation.
D000818:Animals; D002869:Chromosome Aberrations; D003582:Cytogenetics; D004330:Drosophila; D005260:Female; D006570:Heterochromatin; D008297:Male; D051379:Mice; D009030:Mosaicism; D012730:Sex Chromosomes
D006570:Heterochromatin