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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.
What are nymph and imago? Nymphs are larvae of hemimetabolic insects (like grasshoppers). They are very same to the adult insect although smaller. In holometabolic insects (lik
Q. What is the use of Adrenergic Receptor? Adrenergic Receptors are also subdivided into 2 major categories: ALPHA α - or- BETA β In general, when NE (E) binds to alpha r
A 'rag doll' seed tester Fold a square metre of muslin twice in the similar direction. Near one end mark out eight or ten squares about 5 cm by 5cm with a pencil. Number the sq
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Do algae reproduce sexually or asexually? There are algae that replicate sexually and there are algae that replicate asexually. In unicellular algae reproduction is usually
Fusion inhibitor After HIV binds to the host cell surface, a conformational change occurs in the transmembrane glycoprotein sub- unit (gp41) of the viral envelope, facilitatin
what is binomial nomenclature? What are the importance of it?
Explain the Primary Treatment for Managing Food Allergies? The primary treatment for managing food allergies is eliminating the offending food or foods. In fact, non-pharmacolo
Define Conjunctival Xerosis - Micronutrient Deficiencies? Conjunctiva in nonnal children is bright white, smooth and glistening. Conjunctival xerosis is characterized by drynes
Q. Determine the sucrose content in a sample of honey? This activity will help you to: • estimate the non-reducing sugars and total sugars in a sample of honey, • check t
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