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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.
What are the main symptoms of the pulmonary and of the intestinal phases of the ascaris infestation? In the pulmonary stage the ascaris infestation causes cough, hemoptysis, dy
Sympatric speciation can be regarded as speciation where parent species gives rise to a daughter species without the individuals of a species being separated by space or territory.
HACCP Plan : The written document which is based upon the principles of HACCP and which delineates the procedures to be followed.
DIFFERENCE S BETWEEN AXON AND DENDRITE (DENDRON) AXON DENDRIT E (DENDRON) 1. It is single per neur
Explain the Working of Refrigerator in Microbiological Laboratory? Refrigerator is a basic requirement in microbiological laboratory. It is used for maintaining microbial cultu
Define Etiological Risk Factors in Cancer? Cancer risks are climbing because of increasingly sedentary lifestyles and diets which are high in fat and sugar although low in frui
what is known as respiration in animals?
What is the primary energy source for life on earth? The primary energy resource for life on earth is the sun. The sun plays the vital role of keeping the planet warmed and it
Extended point within pulp chamber: Gripping action: - Steglitz forceps or pin pilers. - Access cavity flooded with chloroform to dissolve the sealer. - Grasp the
What is nuclear pollution? Nuclear pollution having of radiations emitted from atomic nuclei, these radiations is highly injurious to living beings. They can be originated from
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