Transposons are of two types, composite transposon and complex transposon. 1. The Composite Transposons: The composite transposons are those which consist of a central region carrying antibiotic resistant genes flanked at both the ends by identical copies of an IS element Therefore, composite transposons carry drug resistance or other markers in addition to transposition (Fig. 8.32A). It is a class [...]
In this article we will discuss about:- 1. Meaning of Transposable Elements 2. Nomenclature of Transposable Elements 3. Classes. Meaning of Transposable Elements: For a long time it was assumed that the genes have fixed chromosomal locations. Genetic recombination is a common process of a cell within which exchange between the homologous DNA sequences takes place. Over the past few [...]
In this article we will discuss about the use of transduction of genetic mapping in viruses. Viruses are the very small particles, hence they are considered unsuitable to study inheritance. Because scorable traits are not available with them. However, some of the bacterial characters have been used for inheritance and recombination studies such as plaque morphology (large or small, fuzzy [...]