confusing lab results

[Julie Bondy]

In article <013378l.1.30A9E082 at axe.acadiau.ca>, 013378l at axe.acadiau.ca
(LARA LAWSON) wrote:

> I attempted a drosphila cross between wild breed and vestigal winges. When I 
> examined the F1 generation the outcome was 100%vestigal. This seems
impossible 
> because the vestigal trait is recessive and the wild dominant. If anyone has 
> any way of explaining this please answer.

   1) Are you sure that this trait is recessive?

   2) Who were the females in the cross?  If it was the vestigial-winged
flies, are you sure they were virgins?  If they weren't, then their
offspring would be the result of vestigial x vestigial.