Ts(1Lt;YSt)P7/Ab(Y)Y146 males produce large numbers of progeny, comparable to wild-type X/Y males. Ts(1Lt;YSt)P7/Ab(Y)Y2 males produce large numbers of progeny.
Ts(1Lt;YSt)P7/0 males show defects at the individualisation process in the testes. No individualised spermatids are seen and nearly every individualisation complex (IC) is associated with a nuclear bundle. In addition, the nuclear heads appear slightly less condensed than in wild-type males. ICs are occasionally observed along the spermatid tails, away from the nuclear bundles, but none are located near the apical tip of the testes.
Male sterile.