Non-autonomy in achaete mosaics ofDrosophila

Abstract

SUMMARYNumbers of bristles are reduced in the dorsocentral regions of achaeteDrosophila melanogaster. In achaete tissue of mosaics the effect is not uniform, and near the clone boundaries bristle numbers are significantly higher than they are elsewhere in the clone. It is argued that the cause of this non-autonomy stems from ‘factors’ that spread into the achaete clone from surrounding non-achaete cells.