Contact Information
Jack S. Frankel, PhD
Professor - Department of Biology
Office Location: EE Just Hall Room 307
Office Telephone: 202-806-6959
Laboratory Location: EE Just Hall Room 324/326

Ph.D., Rutgers University (1976)

Ichthyology (BIOL407)
Genetics (BIOL200)
Population Genetics (BIOL449)

Research Interests
Development of Interspecific hybrid fishes
Determination of inheritance patterns in teleostean fishes
Genetics of Sceloporus jarrovi populations

Research Detailed

Research in my laboratory focuses on the expression of isozymes during the development of interspecific hybrid fishes. These studies relate the divergence in the regulation and expression of multilocus isozyme systems in interspecific hybrids with those of the parental species utilized in forming the hybrids. Additional studies involve the determination of inheritance patterns for coloration and banding phenotypes in teleostean fishes and the genetics of Sceloporus jarrovi populations.

Selected Publications

Frankel, T.E., Yonkos, L.T., Ampy, F.R., & J.S. Frankel. 2017. Exposure to levonorgestrel increases nest acquisition and decreases sperm motility in male fathead minnows (Pimephales promelas). Environmental Toxicology and Chemistry, In Press.
Frankel, T.E., Yonkos, L.T. & J.S. Frankel. 2017. Exposure effects of levonorgestrel on oogenesis in the fathead minnow (Pimephales promelas). Environmental Toxicology and Chemistry 36:32993304.
Frankel, T.E. & J.S. Frankel. 2017 Negative assortative mating based on body coloration in the freshwater platyfish (Poecillidae: Xiphophorus maculatus). Atlas J. Biol. 2017:371-375.
Porter, A.N. & J.S. Frankel.  2014.  Frequency-dependent mate selection in the guppy (Poeciliidae: Poecilia reticulata).  Atlas J.  Biol.  3(1): 212-217
Frankel, J.S. 2014. The Tiger Barb revisited. AMAZONAS, 3(6):16
Frankel, J.S., Adler-Golden, L. & A.N. Porter. 2012. Inheritance of humeral spotting in the croaking gourami (Osphronemidae: Trichopsis vittatus). Atlas J. Biol. 2:84-87.
Frankel, J.S. 2011. Inheritance of shoulder spotting in the red-base tetra (Characidae: Hemigrammus stictus). Atlas J. Biol. 1:62-65
Frankel, J.S. 2009. Inheritance of shoulder spotting in the tetra, Hyphessobrycon bentosi Characidae, Open Fish Science Journal 2:39-41.
Frankel, J.S. 2008. Monogeneic control of sex-limited colouration in the honey gourami, Trichogaster chuna. Journal of Genetics 87:271-273.
Frankel, J.S. 2005.  Digenic control of colouration in the two-spot gourami, Trichogaster trichopterus trichopterus.  Journal of  Genetics 84:101-103.
Middendorf, G., Frankel, J.S. & D. Ruby, 2005.  Variation in populations of Yarrow’s spiny lizard, Sceloporus jarrovi, in the northern Madrean Archipelago region.  USDA Forest Service Procedings RMRS-P-36:100-105.
Frankel, J.S. 2004. Inheritance of trunk banding in the tetra (Gymnocorymbus ternetzi Characidae). Journal of Heredity 95:262-264.
Frankel, J.S. 2002.  Caudal spotting in the Beacon Fish (Hemigrammus ocellifer Characidae).  The Journal of Heredity 93:285-286.
Supriharti, D. & J.S. Frankel, 2002.  Multiplicity and tissue specificity of soluble esterases in seven species of American and African characins.  Gene Families and Isozyme Bulletin 35:41.
Frankel, J.S. 2001. Inheritance of caudal peduncle banding in the spike-tailed paradisefish, Pseudosphromenus cupanus Belontiidae. Journal of Fish Biology 59:1095-1097. 
Frankel, J.S. 2000. Monogenic control of iris coloration in the January tetra (Hemigrammus hyanuary Characidae). The Journal of Heredity 91:411-412.
Frankel, J.S. 1999. Serum esterase as an isozyme marker for the identification of subspecies of the Sumatra Barb, Barbus tetrazona. Gene Families and Isozyme Bulletin 32:43.
Frankel, J.S. 1998. Monogenic inheritance of trunk banding patterns in the Sumatra Barb, Barbus tetrazona. Journal of Fish Biology 53:1357-1359.
Supriharti, D. & J.S. Frankel, 1998. Characterization of soluble esterase isozymes in five species of fishes in the Characidae. Gene Families and Isozyme Bulletin 31:56.
Frankel, J.S. 1997. Genetic variation in the Rosyside Dace, Clinostomus funduloides. Gene Families and Isozyme Bulletin 30:38.
Frankel, J.S. 1997. Ontogenetic patterns of enzyme locus expression in interspecific hybrid fishes. In: Trends in Comparative Biochemistry and Physiology, T. Brittain, H. Huddart, D.R. Nassel, H. Takeuchi, & E.W. Taylor, eds., Vol 3, pp. 119-125, Council of Scientific Research Integration, Trivandrum-695 012, India.
Frankel, J.S. 1997. Inheritance of body coloration in the lyretail toothcarp, Aphyosemion australe (Cyprinodontidae). The Journal of Heredity 88:445-446.
Frankel, J.S., G.A. Middendorf & D. Ruby, 1996. Genetic variation in populations of Yarrow's spiny lizard. Isozyme Bulletin 29:28.
Frankel, J.S. 1994. Patterns of lactate and sorbitol dehydrogenase gene expression during the development of interspecific Rasbora hybrids. Comparative Biochemistry &Physiology 108B: 437-441.
Frankel, J.S. 1993. Isozymes as probes of aberrant gene expression in interspecific hybrids. In: Trends in Comparative Biochemistry and Physiology, J. Menon, ed., Vol 1, pp. 55-62, Council of Scientific Research Integration, Trivandrum-695 023, India.