Sachi Prasad Raychaudhuri received PhD (1940) from University of Edinburgh, UK. He was Professor at the Genetic Research Unit, Institute of Nuclear Physics, University of Calcutta.Sachi Prasad Raychaudhuri received PhD (1940) from University of Edinburgh, UK. He was Professor at the Genetic Research Unit, Institute of Nuclear Physics, University of Calcutta.Sachi Prasad Raychaudhuri received PhD (1940) from University of Edinburgh, UK. He was Professor at the Genetic Research Unit, Institute of Nuclear Physics, University of Calcutta.

Academic and Research Achievements: Raychaudhuari has done much research in animal cytogenetics. He tackled fundamental cytogenetical problems using the chromosomes of the germ-cells of animals both under normal conditions and after physical and chemical treatments. He studied the structure and behaviour of choromosomes with special reference to the sex-determining mechanism of nearly 200 species of insects and Arachnids. His studies on Drosophila showed that the production of sex-limited lethal mutations was independent of the radiation dosage administered in the germ-cells. He and his colleagues also studied the effect of X-rays on the germ-cells of grasshoppers. Dicentric bridges in meiosis, he found, resulted from single chromosome break and the breaks vary linearly with the dosages and are independent of the intensity of radiation. He also did some research on human cancer chromosomes and electron microscopic studies of animal chromosomes.

Awards and Honours: Professor Raychaudhuari was conferred Sunder Lal Hora Medal by INSA (1987).