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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.
How Environmental temperature affect requirement of protein? Environmental temperature: As environmental temperatures rise or fall above or below the range of thermic neutralit
Steroid and Thyroid Hormones Cytoplasmic receptors for steroids are proteins with two subunits that bind to the steroid molecules. When both receptor sites are occupied by the
Le a d It is common cause of poisoning in cattle. Lead poisoning in other species is limited by reduced accessibility, more selective eating habits, or lower susceptibility.
Explain Whipping foam method? Whipping is the most common method used as it forms bubbles by cutting the surface and introducing air into liquid. Repeated action makes the
Why is it important to be familiar with the laboratory apparatus and their uses? If you do not use instruments or lab apparatuses correctly (or use an apparatus for something i
What is meant by substrates of enzymatic reactions? Substrates are reagent molecules upon which enzymes act. The enzyme has spatial binding sites for the attachment of its s
Q. What is the contraceptive mechanism of the IUD? The IUD (intrauterine device) is a piece of plastic coated with copper that is put-in within the uterus by a doctor. Coppe
explain the role of photophosphorylation and chemiosmosis in photosynthesis
In arthropods why isn't gas exchange done through cutaneous diffusion? In arthropods the impermeability of the exoskeleton makes the passage of gases complex. In addition the n
Ask question importance of genetics in human life #Minimum 100 words accepted#
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