P\TTP5.hs has no ability to repress gonadal dysgenesis induced in crosses between M-cytotype females carrying P\TTP5.hs and P males.
The level of mutability of snw in the presence of P\TΔ2-3 is significantly reduced by the presence of P\TTP5.hs (although P\TTP5.hs is less effective than P\TKP.hs at reducing mutability).