Genetic variability in natural populations. Cytogenetics, protein electrophoresis, nuclear DNA (fingerprinting and microsatellites) and mitochondrial DNA haplotype analysis of whale and dolphin species, emphasizing evolution and population structure and dynamics. Cetacean hemoglobins: structure and function; hemoglobin gene regulation. Physiological and genetic aspects of hematologic parameters related to diving capabilities and ecotype in marine mammals. Detection of organochlorines in marine mammal blubber. Inheritance of genetic disorders in horses. Genetic markers for tracking color pattern inheritance in horses.