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Natural selection can therefore mean differential reproduction among members of the sarne gene pool. We earlier said that selection would promote those alleles that give rise to phenotypes that are better adapted to a given environment. In other words, the frequencies of 'such alleles would tend to increase and those of ill-adapted ones would tend to decrease. What we are sayingis that natural selection is a matter of changes in gene frequencies. Differential reproduction has a dual role to perform. One it leads to or maintains adaptations and therefore determines whether individuals of a population or species will survive; and two, it is a process which determines what changes will occur in the frequencies of alleles in a gene pool of sexually reproducing individuals.
Explain about the Toxicity of pyridoxine? Though toxicity related to pyridoxine intake are rare, but use of high doses of pyridoxine for the treatment of pre-menstrual syndrom
What is linkage? Two genes are assumed to be under linkage, or linked, when they reside in the same chromosome. For instance, the research of the human genome discovered tha
Discovery of Plant Hormones To date, five major classes of plant hormones have been discovered namely auxins, gibberellins, cytokinins, abscisic acid and ethylene. It is possi
G round system: Plant tissue system, composed commonly of parenchyma cells with some collenchyma and sclerenchyma cells, that occupies the space between the epidermis and the va
Outline the steps involved in using bacteria to produce human insulin. The gene for insulin is 'cut' from the appropriate strand of DNA using restriction enzymes. Plasmids are
Concomitant caroid endarterectomy and CABG : Symptoimatic or asymptomatic carotid artery disease may be present in patients undergoing CABG. It is very important to recognize thi
father of histology
Role of Private Sector in Health Care - Competition When the private sector is driven by competition it tends to be more efficient. With competition, benefits like cost reduct
#question.why are active cells small .
Explain the Adsorption or Binding Ability? Some fibre components have the ability to bind (adsorb) substances in the gastrointestinal tract. Wheat bran, guar gum, mannan and is
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