From owner-drosophila@net.bio.net Tue Apr 06 23:00:00 1993 Path: biosci!daresbury!keele!uknet!mcsun!uunet!cs.utexas.edu!tamsun.tamu.edu!rigel.tamu.edu!alw9038 From: alw9038@rigel.tamu.edu (WHITEAKER, AMANDA LORRAINE) Newsgroups: bionet.drosophila Subject: Any suggestions? Keywords: genetics student needs help Message-ID: <7APR199311280532@rigel.tamu.edu> Date: 7 Apr 93 17:28:00 GMT References: <9304061856.AA00773@morgan.harvard.edu> Distribution: bionet Organization: Texas A&M University, Academic Computing Services Lines: 41 NNTP-Posting-Host: rigel.tamu.edu News-Software: VAX/VMS VNEWS 1.41 I know this bboard is being set up for scientific discussions about Drosophila. And I realize that a lot of the people who respond and post regularly on this bboard will be geneticists of high repute and people with Doctorates and all that. So, a question from an undergraduate genetics student is probably not quite what the bboard developers had in mind when they set this up. But, it did seem like the right place to ask this question. And I would realy appreciate any suggestions/answers any of you could give me. In my genetics lab, we have been working with Drosophila crosses. We had several different phenotypic traits we could follow, of which we were asked to select two. In the P1 generation, a certified virgin wildtype female was crossed with a male with vestigial wings and an ebony body: v+ e+ v e ======== fm x ======= m v+ e+ v e The F1 generation yielded 100% wildtypes, both male and female. v+ e+ v+ e+ ======== fm x ======== m v e v e But, the F2 generation yielded 100% wildtypes as well. v+ e+ v+ e+ ======== fm x ======== m ? ?. ? ? 123 fm 151 m So, here's my question. How could this have happened? We expected the recessive traits to surface in the F2 generation, but neither of them did. What forces would cause such a strange result? Any input would be greatly appreciated. Lorraine Whiteaker alw9038@rigel.tamu.edu .