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The original DNA sequence when ,transcribed and translated would yield five successive valine residues. But the altered sequence would correspondingly read one aspartate and four serine residues. Mutations resulting from the addition or deletion of base pairs are called frameshift mutations. So far we have discussed the several ways in which the genetic material could be altered. Mutations could be either spontaneous or induced. In recent years there has been a more clear understanding of the causes of mutational process. Tautomeric shifts, ultraviolet radiations, chemicals such as hydroxylarnine, nitrous acid and a variety of alkylating agents can cause permanent alterations of nitrogenous bases. Aromatic compounds such as acridines can cause addition or deletion of one to more than twenty bases in DNA. We have briefly discussed mutations, a way or source of variability in natural populations. Together with recombinations occurring'at the tjnie of meiosis they form the raw materials for selection to act on. Before we discuss briefly about recombination, let us have a quick look at mutation rates in organisms.
Define Factors that Affecting the BMR? Basal metabolic rate, we know, is the largest component of the daily energy demand representing 45 to 70 percent of daily total energy ex
general characteristic of phylum protozoa
Triple Fusion The fusion process between the other male gamete and the secondary nucleus follows the same pattern as syngamy. In most plants, the polar nuclei are only partial
#question.name any two plants having heterotrophic mode of nutrition .
Q. Evaluation of osseointegration? All the parameters of proper implant selection, atraumatic sequential osteotomy preparation and the attainment of primary stability are focus
What is Intra oral and Extra Oral A) Intra oral a) Frontal in occlusion b) Left and right occlusion (Using intra oral photography mirror) c) Occlusal view maxillary
What are possible treatments available for a herniated disc injury?
What are the properties og Gels? Polysaccharides, proteins or colloidal complex particles, such as caseinate micelles form gels at levels of 10% or less. Gums, pectin and gela
Cryptococcosis An opportunistic infection, caused by Cryptococcus neoformans is affecting immunocompromised individuals mainly with impaired cell mediated immunity. The disease
Name a few foods which are best blanched? Yes, green beans, carrots, okra, turnip and cabbage should always be blanched. On the other hand, blanching is not needed for onions,
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