Transheterozygotes are female sterile, exhibit rough eyes and bristle defects (both enhanced at 18oC), meiosis is mostly normal (motile sperm) with some nondisjunction and abnormal spindles and but do have brain defects. Homozygotes exhibit eye and bristle defects. Heterozygotes with Df(3R)Hdγ1 are viable but female sterile.
Phenotype assayed in trans with a multiple mutant chromosome carrying mutations of polo, mgr, asp, stg and gnu.