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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 many different proteins, each composed of 8 amino acids, can be constructed using the 20 different amino acids found in proteins?
How old is the earth? It is believed that the earth is about 4.5 billion years old.
Q. Fluids requirement in chronic diarrhoea? Fluids: Intake should be liberal to minimize the risk of dehydration. Remember we read about fluid management in this section before
What do you understand by Pseudocoelomate? Animals that have a body cavity which is not completely lined by mesoderm. In past these organisms were referred to as the phylum Asc
Transport with the Help of Membrane Protein Even though, the lipid bilayers do not permit the entry of polar molecules such as ions, sugars, amino acids, nucleotides and cell
Explain Horizontal Full Mucoperiosteal Flaps - Endodontic Surgery a) Also called: Envelope flap, b) Only a Horizontal incision, without the vertical releasing incision
Is cell division happening during the entire cell cycle? What is interphase? Cell division properly happens during the mitotic phase of the cell cycle. During interphase proces
in what part of the human body aschelminthes found?
whats the meaning of asexual reproduction
In which of the following functional groups ionization is stabilized by resonance? Select one: a. Carboxyl b. Hydroxyl c. Amine d. Aldehyde e. All of the above
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