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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.
ATP The energy currency of the body One of the monomers used in the synthesis of RNA Contains three phosphate groups àhigh energy Removal of one releases e
The main point of control of β-oxidation is the availability of fatty acids. The major source of free fatty acids in the blood is from the breakdown of triacylg
Contagious caprine pleuropneumonia (CCPP) Mycoplasma mycoides subsp. capri (Mmc) is the main causative agent of caprine pleuropneumonia, a serious malady of goats in our countr
why obelia is considered to be of special interest in zoology as an animal showing an intermediate grade of organisation
Vitellogenesis Vitellogenesis is the stage where much of the oocyte growth occurs. The completion of second maturation division (meiosis), which may occur after ovulation, res
Describe about Postural Changes in Dynamic Auscultation? a) On sudden assumption of supine position from standing on sitting position or sudden passive elevation of both legs:
Rash Diseases such as Lyme disease and SLE which present with rash may be mistaken for ARF. Lyme disease presents with characteristic rash and arthritis (which appears 1 to 2
How Drugs Increase Food Intake? You must understand that drugs may also increase food intake. This is because they can: Stimulate appetite : This is a common side effect
special character of leucosolenia
The eukaryotic cell can be separated into two major portions: the cell membrane that divides the intracellular space from the outer space phisically delimiting the cell; the cytopl
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