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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.
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How dynamic biological processes represented as network? Many dynamic biological processes throughout a wide range of ecological scales are easily represented as dynamical netw
Pseudopodia – Protozoans Pseudopodia are flowing cytoplasmic protrusions of the cell causing amoeboid movement. In protozoans pseudopodia exist in several forms. The most fami
A friend of yours suggests that the origin of life on earth is extraterrestrial in origin (an idea known as panspermia). Can you propose a testable hypothesis to determine if this
(a) Give two examples of diseases which can be spread by contaminated drinking water. (b) How can the spread of such diseases be prevented? (a) Typhoid and cho
Q. Thumb rule for dietary management? The thumb rule for dietary management is to advice the patient to try to cut down or avoid: Red meats. Organ meats such as br
An A=T mispairing leads to an A=C substitution. The other DNA helix will contain a(n) __ pair. a. A=C b. A=T c. G=C d. B=Q e. T=T Can you also explain it please so if I'm ask
Systemic embolization occurs in 22 per cent to 50 per cent of cases of IE. Emboli often involve major arterial beds, including lungs, coronary arteries, spleen, bowel, and extremit
What is the function of vitamin E? In which foods can it be found? Vitamin E, or tocopherol, is a fat-soluble vitamin that participates as coenzyme in the respiratory chain, t
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