confusing lab results

Julie Bondy jbondy at
Thu Nov 16 21:29:37 EST 1995

In article <013378l.1.30A9E082 at>, 013378l at
(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
> 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.

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