Jeffrey Todd Streelman, Ph.D.
Professor and Chair

School of Biological Sciences
Georgia Institute of Technology
Krone Engineered Biosystems Building, 3007
todd dot streelman at biology dot gatech dot edu
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Current Postdocs

Zachary Johnson, Ph.D.
NIH NRSA Postdoctoral Fellow
Postdocal Fellow currently investigating the genetic and neural basis of social behavior in Lake Malawi cichlid fishes. I am using single nuclei RNA-sequencing to study the neurogenetic basis of bower construction, a complex social behavior whereby males construct bower structures for courtship and mating but not for raising offspring. My goal is to understand how natural genetic variation shapes nervous system function and ultimately behavior.
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Current PhD Students

George Gruenhagen
Bioinformatics PhD Student
Bionformatics PhD Student studying the single cell transcriptomics of regenerative dental processes in vertebrates and social behavior in Lake Malawi cichlids. Aims to decipher, interpret, and visualize the complex transcriptomes of cells during these context-dependent biological processes. In my free time, I like to play volleyball and read thick fantasy books by the lake.

Brianna Hegarty
Biology PhD Student
I am a Biology PhD student interested in the genetic and neural signatures underlying variation in evolved social behavior. I am currently utilizing single-nuclei RNA sequencing techniques and spatial transcriptomics to investigate bower-building gene expression patterns in the cichlid telencephalon. In my free time, you can find me raising my wolf, ding-dong-ditch caroling, or collecting shells from faraway beaches.

Tucker Lancaster
Quantitative Biosciences PhD Student
Graduate student in the Quantitative BioScience program, focusing on biological applications of machine-learning and computer-vision. Currently working to improve automated workflows for accurate, high-volume characterization of Cichlid behaviors, including bower-construction and courtship.

Katie Leatherbury
Biology PhD Student
Graduate student in the Biology PhD program interested in understanding neuronal networks and the genomics of complex social behaviors in vertebrates. Currently I am studying rock dwelling Malawi cichlids and aim to use single cell transcriptomics to analyze species gene expression differences during behavioral interactions. In my free time I enjoy competitive cornholing, talking to animals, and painting oil portraits of the squirrels in Piedmont park.

Talha Mubeen
Biology PhD Student
I am a dentist who has specialised in orthodontics, currently a Biology PhD student, interested in bioengineering dental and craniofacial tissues. Presently I am working on craniofacial morphogenesis and transcriptomics of dental regeneration. In my free time, I like making snowmans.

Cait Sullivan
Biology PhD Student
Graduate student in the Biology PhD program, focusing on neural crest development. I am using single-nuclei RNA sequencing to analyze the chronological activation of genes during gastrulation and make comparisons between rock and sand cichlid species. In my free time I enjoy stargazing, competitive duck herding and paranormal investigation.

Current Master’s Students

Emily Deyerle
Biology MS Student
Graduate student in the biology program interested in factors of microbiome variation in various parts of an organism. I am currently studying variation in microbiome composition of oral and gut microbiomes in cichlid species. In my free time I enjoy building my personal library, caring for my many carnivorous plants and swimming in aquariums.

Lab Pets

Brownie likes hanging out with scientists, granite-splooting, and eating artisanal grapes.