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Mutations are the only kind of variability generating mechanism in prokaryotes and asexually reproducing organisms. But in eukaryotes where sexual recombination occurs, even in one generation there is a marked reshuffling of genes in the chromosomes which amplifies the genetic variability in a population. The kind of variability generated by recombination is tested by natural selection in as many genetic backgrounds as possible and in as short time as possible (say in one generation). Thus one of the greatest and fundamental advantages of sexual reproduction is the generation of variability. Provided the populations are large, even if mutations do not exist, the mechanism of sexual recombination alone would be generating new genotypes for very long time.
List three types of evidence used by systematic taxonomists to construct phylogenetic diagrams. Types of evidence contain the morphology of fossil and living species, patterns
Inhibitor Proteins - Enzyme-activity Control One kind of inhibitor protein found in higher plants is an endopeptidase which degrades nitrate reductase thus causing irreversibl
what is the classification of vertibrates
Preparation - Culture Medium Now that you are familiar with the constituents the preparation of medium is quite simple. Several plant tissue culture media are now available
Q. Zonation in the ocean? The oceans play a major role in determining the climate and sustaining life on earth. Oceans help to redistribute the solar energy, through ocean curr
A thiamine defiency will result in decreased activity of: -G-6 phosphase -transketolase -fructokinase
Question: (i) Which species of microalgae are associated with ciguatera fish poisoning? (ii) Name five fish species generally implicated in ciguatera fish poisoning in Mau
In about 80 per cent of ARF patients, ASO titre is significantly raised. ASO titres vary with age, geographical area and other fevers, which influence frequency of streptococcal in
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Q Show Geniculate Bodies of the thalamus? THALAMUS - two large circular shaped masses at "roof" of 3rd brain ventricle. Contains many different nuclei which function as relay
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