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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.
LAN LAN stands for Local Area Network. This kind of network consists of a set of interconnected computers that are not geographically spread out over a large area. For exa
Post-operative Care The goals of care during post-operative period include: Prevent the baby from sucking and crying to avoid tension on suture line. Give proper p
Must account for both food AND light as zeitgebers Because of the continuous light / dark periods of the year; light not always able to act as a zeitgeber. Food
Consider an axon of a neuron. At time=t1, its voltage is at threshold for an action potential; at time=t2, its voltage is at 0 millivolts prior to the peak of that action potential
Out of 67,410 randomly selected surgeries tracked in a study in the UK, 2832 were followed by surgical site infections. a. What is the best estimate of the probability of an
Q What is the system that permits fixation and movement to echinoderms? The system that permits fixation and movement to substrates in echinoderms is called the ambulacral syst
Procedure of radiographic template It is very similar to a flasking procedure. Mix slow setting irreversible hydrocolloid (alginate) with cold water (to gain more working ti
J o h n e ' s disease It is also known as paratuberculosis characterized by chronic enteritis and progressive weakness in dairy animals. E t iology: Mycobac
Define the Indicators of Nutrition? We will begin our study on this topic by first understanding what we mean by an indicator. An indicator is a "specific and measurable statis
Explain the dispersed phase of colloidal system Colloidal systems are not restricted to the dispersion of a solid in liquid. Each of the three states of matter - gaseous, soli
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