Chromosomal analysis and electrophoretic studies were performed on six colour morphs of Dosinia radiata species collected from he same site (54 kms south of Quesir) on the Red Sea coast. Chromosomes were counted in preparations of gonads and gill tissues. The six colour morphs of this species have the same diploid chromosome number of 2n=14. Electrophoretic studies revealed the occurrence of 15 protein fractions in the haemolymph of the six morphs. Although all morphs of this species have the same electrophoretic protein pattern, there are a little variation of these protein concentrations due to some
biological factors