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Each gene has a characteristic mutation rate. Mutation rates are often described as an average per gene basis. For instance, Drosophila has one detectable mutation per 10,000 loci, that is, 0.01% per locus. In humans spontaneous mutation rates have been calculated for some of the dominant lethi1 genes such as retinablastoma, chondrodystrophy and Huntington's chorea. These genes have rates varying from 0.01% to 0.001% per locus which means that one out of 10,000 or 100,000 loci mutates. This is true of most of eukaryotic mutation rates which range from to per locus. Jn prokaryotes the rates may be much lower, ranging from 10-4 to 10-6 per locus. Mutations can also occur in reverse direction by which it is ineant that a mutant gene can mutate back to its wild type form. However, reverse or back mutation rates are much lower than the forward mutation rates.
Equine infectious anaemia Equine infectious anemia (EIA), an acute or chronic viral disease of the equines, shows intermittent fever, loss of weight, depression, progressive w
Indifferences in ionic composition Answer A. across membranes can be created through the action of ATP driven pumps as long as number of negative and positive ions on remain equal
Alluvial Materials of this catego~ya re deposited by running water in the form offroodplains, river terraces, deltas and alluvial fans. These deposits have two outstanding char
How to determines the actual availability of nutrients The amount of a particular nutrient determined analytically does not necessarily represent what is available but is merel
What is the function of a control group in an experiment? The function of a control group in an experiment is to be a stable to account for any effects a given environment has
Accidents Resulting in Death Accidents that cause death are dealt with in a different way. The law requires full compensation to the widow for complete life or until remarriag
Explain Sodium Sodium (Nu) : In sodium-restricted diets, no salt is added to the diet which still provides approximately 50 mmoL Na. Foods containing high Na content must b
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Copper deficiency Copper deficiency may be primary or secondary (conditional). Primary copper deficiency occurs due to its inadequate dietary intake; whereas secondary copper d
Define about the Metabolism of Selenium compounds? Selenium compounds' are generally very efficiently absorbed by humans and selenium absorption does not appear to be' under ho
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