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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.
a) Mention the scientific term used for modified form of reproduction in which seeds are produced without fusion of gametes. b) What does ecological niche of an organism represe
CHOLESTEROL Other name is parental steroid. It is present all over the body but absent in cerebrospinal fluid. Cholesterol is found exclusively in animal food. It
Pathophysiology Asthma result from several physiological alterations, including altered immunologic response, increased airways resistance, increased lung-compliance, impaire
How to repair the defects in post myocardial ? Repair of Defect : The approach to the defect is through ventriculotomy over the infarcted area. The defect is repaired
Clonig,plasmid vectors,lambda&M13based vectors
Genomic libraries are screened by hybridization with a DNA probe which is complementary to component of the nucleotide sequence of the desired gene. The problem should be
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Functional regions of digestive system In general the digestive system of metazoans is divided into 4 major functional regions of: Reception Conduction and s
Greater Palatine nerve and vessel The greater palatine nerve runs forward in a groove on the inferior surface of the hard palate to communicate with nasopalatine nerve in inci
To verify the effect of intra-specific competition on the growth of saplings of Eucalyptus dives, an experiment was designed in which two sets of pots were used. In the first set o
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