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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.
Reproduction and Life Cycles – Protozoan Asexual reproduction occurs in all protozoan through fission, budding and cyst formation. In this method the organism reproduces to fo
Q. Explain False Positive Tests? As ST depression has been equated with CAD, patients with this finding who have less than a critical coronary narrowing has been called false p
Bacteriophage is a virus which infects a bacterium and which is many times used in molecular genetics experiments as the vector, or cloning vehicle. Recombinant phages can be made
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Define Starch - Carbohydrates? Starch is the major form of stored carbohydrate in plants. Starch, as you may already know, is composed of a mixture of two substances: amylose,
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Define Classification of Carbohydrates - Degree of Polymerization? Classification on the basis of Degree of Polymerization (DP) Carbohydrates are classified by their degree
Q. What is Goitrogens anti-thyroid substance? Ans. Goitrogenslanti-thyroid substances present in certain plant foods have been found to interfere with the uptake of iodine
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