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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.
Determine the Preservation Changes While Cooking? While cooking, two preservation changes (at least) occur which include: 1. Destruction or reduction of microorganisms 2
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Q. What is myocardial infarction? The Myocardial infarction is the condition in which an area of this tissue or the entire heart muscle dies by hypoxia due to lack of blood irr
Peak Flow Velocity fs derived from Doppler shift by rearranging Doppler equation: V = C/2 x ΔF/Fo Various information can be obtained from spectral display
D-glucose differs from D-galactose only in the arrangement around carbon 4. Therefore D-glucose and D-galactose are- Select one: a. enantiomers b. epimers c. mirror ima
Describe Protocol that are used for Endotracheal Intubation in ICU Intubation is a three person procedure; skilled assistance is mandatory: • "Top end" intubator who coordi
Echinodermata - Regeneration in Invertebrates Asteroids (starfishes), ophiuroids (brittle stars) and crinoids (sea lilies) can reproduce their lost arms and although parts of
what is the importance of itamembranous ossification
Q. What are the Communication process steps?Communication process steps: 1. Rapport Building 2. Finding the Problem 3. Planning 4. Implementation of the Plan 5. Ter
What was the experiment of Stanley Miller (1953) on the origin of life? In 1953 the Stanley Miller arranged an experimental apparatus that simulated the atmospheric conditions
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