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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.
How Physical Activity affect requirement of protein? Research on protein needs for muscular work had its beginning in 1863 when Von Leiberg postulated that muscle protein was d
A genomic DNA library is made from the genomic DNA of an organism. For instance, a mouse genomic library could be made by digesting mouse nuclear DNA with a restriction nuclease to
Tanapox Tanapox infection is endemic to equatorial Africa and is extremely rare outside Africa. Tanapox was initially recognized in humans in 1957 and 1962 in Kenya. It is caused
POULTRY BREEDING Poultry breeding has acquired pre-eminence over all other domesticated livestock enterprises. Production level of layer and broiler type of chicken touched spe
Define Clinical Significance and Risk Factors for Drug-Nutrient interactions? We are already aware of the fact that poor nutritional status can impair drug metabolism and the d
What is the relationship between the concept of reproductive isolation and the concept of species? The Reproductive isolation is an important concept because it defines the con
Q. Is the ventricle lumen larger during diastole or during systole? During diastole the opposite occurs. The muscle fibers of the ventricles relax and the lumen of these chambe
Explain the gradient theoryof experimental embryology
Describe in detail about the Huntington's disease The brain of a person who has died as a result of Huntington's disease or Alzheimer's disease will look abnormal even to the
what is vaso-constriction
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