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Knock-out experiment is a method for deleting, mutating or otherwise inactivating the gene in a mouse. This laborious technique involves transfecting a crippled gene into cultured embryonic stem cells, searching through thousands of the resulting clones for one in which the crippled gene exactly replaced the normal one (by the homologous recombination), and inserting that cell back into the mouse blastocyst. The resulted mouse is chimaeric but, if you are lucky enough (and if you've gotten this far), its germ cells will carry the deleted gene. A few rounds of causious breeding can then produce progeny in which both the copies of the gene are inactivated.
Iron Iron is an essential component of the proteins involved in oxygen transport or utilization. These proteins, including hemoglobin, myoglobin and a number of cytochrome and
An mRNA molecule codifies only one type of protein? Eukaryotic cells have monocistronic mRNA, i.e., every mRNA codifies only one polypeptide chain. Prokaryotes can present poly
ME T AMORPHOSIS The differentiation results in the formation of larva / infant. The formation of adult from the larva / infant is called as metamorphosis. The metamorph
How are the male gametophytes and the male gametes formed in angiosperms? In the anthers of every stamen there are pollen sacs. Within the pollen sacs there are microspore moth
THEOR Y OF GERMPLASM - August Weismann (1834-1914) criticized the inheritance of acquired characters by putting forward the theory of continuity of germplasm. According
What are The main purpose of changes in life style The main purpose of changes in life style are to: - control blood sugar. - maintain the body weight of the patients.
Q. What is Short acting insulin? Short acting: This type of insulin begins working quickly, works hardest 2- 3 hours after injection but is completely gone after 4-6 hrs. So if
Soil is upper crust of earth which support land plants and animals. It is defined as addition of substances to the soil, which adversely affect physical, chemical? And biologica
Cornea - Organogenesis of Eye and Limb The fully formed cornea contains 2-cell layered epithelium and the stroma made of extra cellular secreted materials. The bulk of the
Define Swollen and Tender Joints and haemorrhage in various Tissues? Haemorrhages occur deep in muscle, particularly in calf, thigh, buttocks and forearm, causing pain in surro
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