In this article we will discuss about the genomes in chloroplast DNA and mitochondria DNA. The phenomenon of extra-nuclear inheritance based on transmission of visible phenotypes through mitochondria and chloroplasts. Studies in the 70s revealed presence of DNA in these organelles. Both mitochondria and chloroplasts are present only in cells of lower and higher eukaryotic organisms. Detailed studies established that [...]
In this article we will discuss about the meaning of transgenic mice. Cloned genes can be introduced into the germ line cells of an animal allowing study of the intact animal rather than in cultured cells. For this purpose, the nucleus in mouse embryonal cells has been used for injecting foreign DNA. The goal in such experiments is to have [...]
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 [...]