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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.
Determine recommended nutrient intakes by selenium? The FAO/WHO 2004 recommendation for nutrient intake for selenium by groups is given in Table. How do these recommendations c
How does the Cornea work, I heard that it is like a motor, however i''m not too sure... because a motor is in vehicle and has piston, and the Cornea is in our eyes and... Well does
Brain Neurosecretory Cells and their Hormones Kopec was the very first to suggest the role of hormones in controlling metamorphosis. On the base of his experiments on the lar
Define Protein Stabilized Food Emulsions? Many food products are emulsions (eg. milk cream, ice creams, cream, butter etc.) and protein constituents often play a major role in
Yeast is cultured in the presence of radioactive phosphate and the following biological molecules are purified. Which molecule should be most radioactive? A. An oligosaccharide B.
There are specific sensitive/critical periods in development during which acquisition of certain skills is substantially easier than at other times. In the animal domain there are
what is ribosomes
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Q. Can you explain Cholera? Cholera is one of the diseases which had caused epidemics all over the world. The organism which causes the disease is Vibrio cholerae. It is an
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