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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.
MUCOPO L YSACCHARIDES They are heteropolysaccharides of high molecular weight that are gelatinous is consistency, functioning in lubrication and as sticky substances in or
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he Lac Repressor protein, which we will talk about a bit later in the course, is important for controlling expression of a number of genes in E. coli. There are about 10 copies of
Q. What is the life cycle of the hookworms? The Adult hookworms within the human intestine release eggs that are eliminated with the human feces. Under the adequate conditions
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What are some prophylactic measures against ascariasis? The main prophylactic calculates against ascariasis are: efficient washing of vegetables and other foods; basic sanitar
Q. How do antibody-based tests detect how HIV infection works? Subsequent to the infection by the HIV the immune system begins the production of antibodies (primary immune resp
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