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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.
Toxoplasma cycles between its rodent and feline hosts, living out different phases of its existence in each. What is the scientific means about the cat and mouse?
In this section, we shall discuss a classic example of natulal selection in action. In the preceding unit, it was stated that natural selection always aims at eliminating alleles,
PHYSICAL EXAMINATION OF A CHILD This practical as you have seen above deals with assisting in various diagnostic procedures of a child. The first responsibility of you as a
Compare and contrast enantiomers, epimers, and anomers, specifically in relation to sugars.
what is the role of cholesterol in membrane fluidity?
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The middle course - Classification of the river The middle course of the river occurs over the foothill belt where the velocity or water is comparatively less which moves a li
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