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Caudal spotting in the beacon fish (Hemigrammus ocellifer Characidae)
1Department of Biology, Howard University, Washington, DC 20059, USA. jfrankel@howard.edu
The Journal of Heredity
|October 31, 2002
Abstract:
The beacon fish (Hemigrammus ocellifer) exhibits two phenotypes associated with spotting at the base of the caudal fin, with fish either possessing (H. o. ocellifer) or lacking (H. o. falsus) a prominent red spot in this region. Segregation patterns observed from the progenies of 15 different crosses support a hypothesis that caudal spotting in this species is controlled by a single gene with two alleles, for which the caudal spotting allele is completely dominant.