research experience for teachers · 2013-06-25 · research experience for teachers university of...
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Research Experience for Teachers
University of Notre DameJune 25 – August 3, 2007
John A. Bogucki, South Bend Clay High School
Dr. Hope Hollocher
Associate Professorof Biology
Population and Evolutionary Genetics
Speciation, Evolution and Development
Heather Eisler, Doctoral Candidate
Genomics and Speciation
Research withDrosophila melanogaster, Drosophila simulans and their Hybrids
Allison Jeter John A. BoguckiClay High School Clay High School
Sophomore Teacher
-Sexing Drosophila
Females MalesGenerally larger Generally smaller
Pointed abdominal tip Rounded abdominal tip
Dorsal abdominal surface Dorsal abdominal surfacestriped to tip with solid black tip
Unique, light colored genitalia Unique dark colored genitalia
D. Melanogaster & D. simulans
1. Genome wide comparisons (both species)18,769 genes on a haploid set of 4 chromosomes
2. 14 specific female fertility genes
3. Differences in female hybrid fertility
4. Fertility and Mating Preferences
Haldane’s Rule
Postzygotic Isolation (between related species) is first manifested by the sterility or inviabilityof hybrid males,
and then, as the genetic distance increases, by the sterility or inviability of hybrid females
D. melanogasterFemales
D. simulansFemales
D. melanogasterMales
D. simulansMales
Inviable females
(die as embryos)
Sterile males
Sterile females
Inviable males
(die as larvae)
1. MAZ 1 simulans X melanogasterF1 females, very fertile
2. MAZ 2 simulans X melanogasterF1 females are sterile
3. MAZ 6 simulans X melanogasterF1 females, somewhat fertile
2007 Primary RET Lab Activities
1. Preparation of Fruit fly food2. Transferring of fly cultures to fresh food to
increase stock populations and for experimental crosses
3. Collecting F1 virgin females4. Collecting virgin males of both species5. Creating mating opportunities and recording
the data
2007 Data
0
5
10
15
20
25
30
Sim Mel None
Fly type
# of
F1
fem
ales
Maz 1Maz 6Maz 2
2005, 2006, 2007 Data
0
10
20
30
40
50
60
Sim Mel None
Fly Type
# of
F1
fem
ales
Maz1Maz6Maz2
2007 Ret Lab Activities continued
6. PCR (DNA amplification)7. Preparation of Gels8. Gel Electrophoresis
Gel Electrophoresisin the Hollocher Lab
RET
August 1, 2007
2007 RET Lab Inspired Activities
Drosophila crosses to show sterility inF1 interspecies hybrids
Drosophila crosses to show patterns of genetic inheritance
Forensic Labs involving Gel Electrophoresis
Acknowledgements
Dr. Hope HollocherHeather EislerHollocher Lab PersonnelDr. Michelle WhaleyDr. Alexander J. HahnNevin LongneckerAlisa Zornig