Patty Brennan

  • Associate Professor of Biological Sciences
Patricia Brennan

Patricia (Patty) Brennan is interested in the morphological evolution of genital morphology in vertebrates, and the mechanisms that drive genital diversification, sexual conflict in particular.  She has a BSc in Marine Biology from her native Colombia, where she studied cardiac physiology of marine mammals. She went on to work in the Galapagos Islands aboard a research vessel (R/V Odyssey).  Brennan completed her Ph.D. dissertation at Cornell University, where she studied the breeding biology and reproductive system of the Great Tinamou (Tinamus major), a basal bird from South America related to the ostrich.  During this time she developed an interest on post-copulatory selection in birds, and went on to do her post-doctoral work on genital and sperm traits in ducks.  Her current interests have expanded to understanding genital evolution in vertebrates, in particular examining female genital morphology and coevolution. She worked as a research professor at Umass Amherst before joining the faculty at 91熟女 College.

Brennan鈥檚 research has received much media attention and she has become very interested in public outreach and education, and is an advocate (in print and lectures) of the importance of science communication and defense of basic science.

Areas of Expertise

Morphological evolution of reproductive structures, sexual conflict, post-copulatory sexual selection.

Education

  • Ph.D., Cornell University
  • B.Sc., Universidad de Bogota Jorge Tadeo Lozano

Happening at 91熟女

Recent Campus News

Two 91熟女 College students have been selected for the second round of the Beckman Scholars Program. As part of the 15-month program, students delve deeply into advanced research projects with the mentorship of a College faculty member.

91熟女 College Associate Professor Patricia Brennan鈥檚 research has revealed the mating method of alpacas to be unlike any other known mammal. During copulation, male alpacas have been found to inseminate females directly into the uterus.

91熟女 College held its annual Faculty Awards Ceremony and celebrated five faculty members for their teaching, research and service.

Recent Grants

Patricia Brennan received a grant from the National Science Foundation for the project 'CAREER: Integrating Form and Function in the Coevolution of Copulatory Traits. The project is for five years (2021).

Recent Publications

Keeffe, R. M., Zhang. B., Anderson, P. and Brennan P.L.R. 2025. Evolutionary Morphology of Genital Spines Informed by Puncture Mechanics. Proc Royal Soc B. https://doi.org/10.1098/rspb.2025.1698

Keeffe, R. Hedrick, B, Bartoszek, I., Easterling, I. Brennan, P.L.R. 2025. Morphological Variation in the Genitalia of the Burmese Python. Journal of Morphology. 86(4), e70045.

Brennan, P.L.R., Purdy, S., and Bacon, S. 2024. Intrahorn insemination in the alpaca: damage to the female tract, and immune consequences. PLoS ONE 19, no. 4: e0295882

Folwell, M., Sanders, K., Brennan, P.L.R., and J. Crowe-Riddell. 2022. First evidence of hemiclitores in snakes. Proc. Royal Soc. B. 289: 20221702. https://doi.org/10.1098/rspb.2022.1702.

Lara Granados, G. Greenwood, J. Secor, S. Hedrick, B. and P.L.R. Brennan. 2022. 3-D examination of the genital morphology of male and female diamond watersnakes Nerodia rhombipher. Biological Journal of the Linnean Society. 10.1093/biolinnean/blac051

Recent Honors

Dr. Brennan was invited to give a series of talks in Europe: On Genital Evolution and the Overlooked female. September 8th 2025: Orebro University, Sweden. September 22d 2025: Universit脿 di Padova, Italy. September 25 and 26th, 2025: Facult茅 de M茅decine, Universit茅 de Gen猫ve, and Bioscope, Fondation Convergences. Switzerland. October 1st 2025: Konrad Lorenz Institute for Ethology. October 3rd 2025: University of Vienna, Austria.

Dr. Brennan delivered the Departmental seminar at Iowa State University on April 18, 2025 titled 鈥淕enital evolution in vertebrates and the understudied female.鈥

Dr. Brennan was invited to talk on April 1, 2024 at the Los Angeles Museum of Natural History, First Friday at the Museum event.

Dr. Brennan was invited to speak at Texas A&M on March 25, 2024.

In the fall of 2023, Dr. Brennan was invited to speak at the University of Montana, Duluth (September), the University of Nebraska (October) and honored as the Graduate Student Invited speaker at Marquette University (November).

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