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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.
Explain for Procedure Quantitative Determination of Viable Microbes? Now carry out the exercise following the steps included herewith: 1. Label the diluent tubes from 10 -1
are there non-parasitic viruses
The middle course - Classification of the river The middle course of the river occurs over the foothill belt where the velocity or water is comparatively less which moves a li
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Pulmonary edema is life-threatening condition and therefore, treated as a medical emergency. As is the case with chronic stable heart failure, identification and correction of any
Functions of the Vascular System The major function of the circulatory system is to provide a transport mechanism for the blood flow to and from the heart. The vascular syste
In the axon of a nerve cell, A. the voltage-dependent conductance of the voltage-gated potassium channel has a faster time course than the voltage-dependent conductance of the
If you observe symptoms of overall wilting, stunting, and thinning of the leaves, would you expect a foliar or root disease? Why?
Classification of Diabetes Mellitus a) Type1Diabetes Mellitus i) Type 1 a ii) Type 1 b b) Type 2 Diabetes Mellitus c) Others i) Gestational Diabetes Mellitus
in what part of the human body aschelminthes found?
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