Valenzuela Lab

Dr. Nicole Valenzuela Department of Ecology, Evolution, and Organismal Biology

Iowa State University

251 Bessey Hall. Ames, IA 50011

(515) 294-1285


RESEARCH OVERVIEW We are interested in studying how ecology affects the structure, function, and evolution of the genome and its role in the development and evolution of complex phenotypes. This helps us understand the evolution of biological diversity and how it responds to environmental change.



News And Events Our latest pubs and more

Dr. Valenzuela receives new NSF grant (IOS 1555999) to study the Evolution of Turtle Dosage Compensation

Sex determination and the birth and death of species. Ecology and Evolution 2016. PDF

Cytogenetic insights into the evolution of chromosomes and sex determination reveal striking homology of turtle sex chromosomes to amphibian autosomes. Cytogenetic and Genome Research 2016. PDF

Discovery of youngest sex chromosomes reveals first case of convergent co-option of ancestral autosomes in turtles. Chromosoma 2016. PDF

Physical mapping and refinement of the painted turtle genome (Chrysemys picta) inform amniote genome evolution and challenges turtle-bird chromosomal conservation. Genome Biology and Evolution 2015. PDF

GRADUATE AND POSTDOCTORAL POSITIONS Positions are available for individuals interested in evolutionary biology, sex determination, evo-devo, chromosome and genome evolution, or climate change. Click here for details.

Sex Determination Evolution and Regulation of Developmental Networks


Why do organisms vary so remarkably in the ways they produce males and females? Our work focuses on comparative evolutionary and ecological genomics related to the evolution of developmental pathways, particularly those that underlie the development of the sexual phenotype.

Phylogenomics Sex Chromosomes and Genome Organization


What are the causes and consequences of chromosome evolution? We are studying (a) the evolution of sex chromosomes and the genes they contain, plus (b) the genome rearrangements responsible for changes in diploid number across turtles and their association with transitions in sex determination.


Tree of Sex Database Paper
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