Eggs derived from polo1/poloDD1 females complete meiosis and show a phenotype similar to that of eggs derived from polo1 females; they contain many bipolar anastral spindles but lack structures containing polar bodies.
Transheterozygotes are female sterile, exhibit no cuticular, testis or premeiotic defects but do exhibit a mutant brain phenotype. No defects in spermatogenesis so transheterozygous males are fertile.
Phenotype assayed in trans with a multiple mutant chromosome carrying mutations of polo, mgr, asp, stg and gnu.