Skip to Content
Associate Professor of Biology
Office: 222 BBIowa City, IA 52242
Email: email@example.comWeb: More About Dr. McAllister - Related Websites and Resources
BS, Zoology, Texas A & M UniversityMS, Genetics, Texas A & M UniversityPhD, Biology, University of Rochester
Post Doctorate, Molecular Evolution, UNIV OF CHICAGOPost Doctorate, Molecular Evolution, UNIV EDINBURGH
Interdisciplinary Graduate Program in GeneticsInterdisciplinary Graduate Program in Informatics
Evolutionary Genetics and Genome Evolution
My research interests are in the field of evolutionary genetics, especially in understanding processes occurring at or influenced by the genome. Active research projects in the lab are primarily focused on using the fly species Drosophila americana to identify the factors influencing chromosomal change and the mechanisms driving the differentiation of sex chromosomes.
Changes in chromosomal arrangement are common, but their significance is unknown. We are currently examining a chromosomal rearrangement involving a centromeric fusion of the X chromosome and an autosome in D. americana (Fig. 1A) This derived arrangement exists as a polymorphism with the ancestral arrangement, showing a strong latitudinal cline in the central and eastern US. Studies are examining the hypothesis that these alternative chromosomal arrangements coordinate adaptive genetic variation.
Independently evolved pairs of sex chromosomes exhibit similar patterns of differentiation. The Y chromosome is genetically inert, and the X chromosome contains many active unique genes and often compensates for differences in dosage between genders. The X-4 centromeric fusion in D. americana (Fig. 1A) provides a system for examining the earliest asymmetries between newly evolved sex chromosomes. We are testing models of sex chromosome evolution by examining patterns of sequence variation on this pair of neo-sex chromosomes.
Date Last Modified: 04/12/2016 -
Copyright © 2015 The University of Iowa. All Rights Reserved.