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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.
Q. How do antibody-based tests detect how HIV infection works? Subsequent to the infection by the HIV the immune system begins the production of antibodies (primary immune resp
TYPES OF CLEAVAGE - Depending upon the distribution & amount of yolk, cleavage is of following types - 1 . HOLOBLASTIC EQUAL CLEAVAGE ( holos , whole ; blastos, ger
Explain the Diet and Feeding Patterns of infants? In this section, we will learn about diet and feeding patterns of infants and the pre- schoolers. The discussion has been sub-
Pseudopodia – Protozoans Pseudopodia are flowing cytoplasmic protrusions of the cell causing amoeboid movement. In protozoans pseudopodia exist in several forms. The most fami
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Define about skeletal muscle? A. The binding of calcium ion to a binding site on the troponin molecule leads to a movement of the tropomyosin molecule that, in turn, exposes a
What are the cell kinds that form the phloem? What are the major features of those cells? The major cells that form the phloem are the sieve elements and the companion cells an
PARATHYROID DISORDERS - (i) Hypoparathyroidism (deficiency of PTH) . It causes the lowering of blood calcium level. This increases the excitability of nerves and muscles, caus
Complications of Exchange Transfusion i) Infection of umbilical vessels and systemic injection related to blood transfusion like malaria, CMV, AIDS and hepatitis B. ii) O
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