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Gene targeting in ES cells: In some of the livestock species pro-nuclear injection cannot be used to modify the animals' own genes due to various reasons especially non availability of large number of fertilized eggs and translucent zona. By contrast, the use of embryonic stem (ES) cells in the mouse has enabled us successfully in developing target specific modifications. When these cells with modified DNA are inserted into the early embryo, may contribute to the germline. They undergo a homologous recombination with transferred DNA of interest resulting in to precise and targeted changes in host genome. It is because of combination of these two properties, gene targeting including knockout of some undesired genes in mouse germline is a routine procedure. Despite extensive efforts globally, stable ES cells have not been isolated from livestock and this has constrained many potential applications for germline manipulation. Therefore, it was with some excitement that researchers in the field greeted the news that cloning by nuclear transfer (NT) from cells grown in culture had been achieved as it pointed the way to the development of an alternative, cell-based, system for genetic modification.
Why do ribosomes move along mRNA during translation? During translation the ribosome always exposes two mRNA codons to be translated by moving along the mRNA. When a peptide bo
-The expected phenotypic ratio of offspring. -The expected genotypic ratio of offspring. -Calculate the expected values you would use on a chi-square test (use genotypic rati
Oogenesis in Mammals In mammals also the oogonial cells are derived from primordial germ cells. The multiplication phase, that is all of the oogonial divisions and transforma
Question 1: Describe the need for Harmonization in clinical trials? Brief on the Revised ICH terms of reference and explain the structure of ICH? Need for Harmonization i
Convergent evolution is the development of the similar type of structures in distantly related organisms as a result of adapting to similar environments or strategies of life. For
Define Formation of healthy food habit - combat from obesity? Discarding faulty habits as early as possible. Most food habits formed at this age are for a life time. Special c
Q. How do kidneys participate in the regulation of the acid-basic equilibrium of the body? How are alkalosis and acidosis respectively corrected by the kidneys? Kidneys can reg
Phylum Ciliophora 1) They have cilia at some stage in the life-cycle. The cilia are used for locomotion or creating a feeding current. 2) They feed heterotrophically usually
Define Some Caution for Inoculating Loops and Needles? 1. Heat the inoculating wire till it becomes red hot. 2. Never use hot inoculating wire for culturing otherwise cells
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