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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 the Swab Method? Swab method is the oldest and widely used method in food and dairy industry and was developed by W.A. Manheimer and T. Ybanez in 1917. A sterile cotton
Q. Categories of value of biodiversity? The value of biodiversity is often divided into two main categories: · UTILITARIAN (also known as instrumental, extrinsic, or use) v
What is the type of digestion that occurs in cnidarians? These animals have a digestive cavity and they make intracellular and extracellular digestion. The extracellular digest
Explain Healthcare Burden OF HEART DISEASES? CAD and its complications use up a substantial portion of the scarce healthcare resource of the country. It has been reported that
Cages for keeping animals in the science room It is frequently desirable in elementary and general science to stay animals caged in the science room for short periods of observ
classifcation of protozoans
pictures of phaseses
What concentrations of succrose gradient are used to separate between the two types of endoplasmic reticulum please?
Describe the Supra Cardiac Type of TAPVC ? After connecting the baby to cnrdiopulmonary bypass, the common pulmonary venous channel is dissected. This lies behind the left atr
give the discriptive account of nerilla which belongs to class arciannelida in phylum annelida
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