In this article we will discuss about the mapping of rII locus in T4. The wild type T4 phage produces small plaques with rough edges on both strains B and K of E. coli. The r mutants (rapid lysis) are easily distinguished by their large, sharp-edged plaques. The wild type phage do not lyse and release progeny phage as rapidly [...]
In this article we will discuss about the introduction and intron, exon structure of split genes. Introduction to Split Genes: It has been generally believed that a gene is a continuous, uninterrupted sequence of nucleotides which codes for a single polypeptide chain. Some recent work has shown that this may not always be so. The sequences of some eukaryotic genes [...]
In this article we will discuss about the definition of gene families. While most prokaryotic genes are represented only once in the genome, some genes in eukaryotes are repeated many times in multiple copies, called gene families, thus contributing to the large size of the genome. In specific cases, multiple copies of a gene are necessary to produce RNAs or [...]