People

Daniel Weinreich, PhD 
Principal Investigator
Associate Professor of Biology
Ecology & Evolutionary Biology and Center for Computational Molecular Biology 

Office: 300 Walter Hall (401)/863-3937
Lab: 528 BioMed Center (401)/863-2749

Office Hours: By appointment and Wednesdays 1 - 3 during the fall term

Daniel_Weinreich at brown dot edu

Dr. Weinreich's Curriculum Vitae.pdf

 

POSTDOCTORAL FELLOWS

Eugene Raynes, PhD 
BA New York University 2006
PhD University of Pennsylvania 2012

Yevgeniy_Raynes at brown dot edu

I use experimental evolution and computer simulations to study evolution of the genomic mutation rate. During my PhD I examined the evolutionary dynamics of mutator alleles in experimental microbial populations, focusing on indirect selection experienced by mutators due to their associations with beneficial mutations. Currently, I am using computer simulations to investigate the evolutionary dynamics of chromosomal instability during cancer progression.



 

GRADUATE STUDENTS

Christopher Graves
Graduate Student
BS University of Vermont 2009

 

NSF Graduate Research Fellowship 2013 - 2016
NSF Doctoral Dissertation Improvement Grant 2015 - 2016

Christopher_Graves at brown dot edu

Natural selection is inherently short-sighted, favoring traits based on their immediate effects on survival and reproduction. However, natural environments are constantly changing, and thus the fitness effects of many traits are variable through time. My research examines the consequences of this temporal variation in fitness and the role it plays in adaptation. Current projects include developing mathematical models and simulations to explore the consequences of variable selective pressures in the evolution of infectious diseases and experimental work to test predictions of evolutionary theory by tracking the evolutionary dynamics of yeast populations as they evolve in a variable environment. 


Yinghong Lan

Graduate Student
BS University of Science and Technology of China 2012

Yinghong_Lan at brown dot edu

My general interest includes fundamental theoretical questions in the fields of population genetics and evolutionary genetics, and testing these ideas using simulations and microbial experiments. Recently I have been working on understanding mutational robustness, i.e., the ability to sustain fitness against deleterious mutations. Combining analytical with simulation approaches, our research show that in contrast to the conventional wisdom, flatter regions of the fitness landscape cannot confer long-term resilience against mutations. We propose instead that fitness “domes”, i.e., fitness peaks with negative epistasis, is where selection would drive populations constantly facing the challenge of high mutation rates. I’m currently testing this hypothesis using both Wright-Fisher simulations and directed evolution of TEM-1 ß-lactamase in E. coli.

 

Current Undergraduates

Jacob Jaffe '17
Christy Le '17
Chibuikem Nwizu '17
Sovijja Pou '17
Amanda Zajac '17 
Emmett Aksira '19 

Alumni