In this article we will discuss about the genetics of viruses. History of Viruses: Viruses were first discovered in 1899 when M. W. Beijerinck noticed the existence of microorganisms invisible in the microscope, that could pass through filters that stopped bacteria. In 1917 Felix d’Herelle gave the name bacteriophage (meaning eater of bacteria) to one […]
Genetics of Viruses (With Diagram)
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The Genetic Map of E. coli | Genetics
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In this article we will discuss about the genetic map of E.coli. Several methods have revealed that the genetic map of the main chromosome of E. coli is an un-branched circle with a circumference of 100 minutes (Fig. 17.5) which corresponds to the transfer time during conjugation. About 650 genes have been mapped. Some important […]
Define Conjugation in Bacteria | Genetics
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In this article we will discuss about the definition of conjugation in bacteria. The occurrence of recombination by sexual union was first shown experimentally in 1946 by Joshua Lederberg and E.L. Tatum in E. coli. They took two auxotrophic strains neither of which could grow on minimal medium due to mutation in genes controlling synthesis […]
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