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	1998 Fellow			Antonio Carvalho, Ph.D. Associate Professor Federal University of Rio de Janeiro Departamento de Genetica Caixa Postal 68.011 CEP 21-944-970 Rio de Janeiro Brasil Phone: (55)(21) 2562-6387 Fax: (55)(21) 280-0994 Email: bernardo@biologia.ufrj.br

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Field: Population Genetics & Molecular Evolutionary Genetics

Research Interest: The evolution of sexual proportion is a major biological phenomenon about which there are several unanswered questions. We are using the sex-ratio meiotic drive system of Drosophila mediopunctata as an experimental model to study three of these questions: Fisher's Principle and the commonness of the 1:1 sexual proportions; the evolutionary genetics of Y-linked suppressors of meiotic drive; and the population genetics of limit cycles.