In this article we will discuss about the classification and morphological groups of bacteriophages. Classification of Bacteriophages: On the basis of presence of single or double strands of genetic material, the bacteriophages are categorized as under: 1. The ssDNA Bacteriophages: (i) Icosahedral phages = φx 174, St-1, φR, BR2, 6SR U3 and G series, e.g., […]