You are conducting sex-linked crosses between female (XX) and male (XO) american grasshoppers (Schistocerca americana). The gene for wing length is located on the X chromosome. If you crossed a male grasshopper with the recessive short-wing trait and a female grasshoper with the dominant long-wing trait and found all the F1 offspring to have the long-wing trait, what would you expect among the F2 progeny?