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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.
The goals of biological classification The world of animal diversity is quite complex and it requires an ability to recognise similarities and differences among organisms. Class
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Explain the Selective Media - Culture Media? It is used to select specific groups of bacteria by favouring the growth of desired bacteria and inhibiting the growth of undesired
The human blood group, related to the MN system is controlled by two alleles, S and s. Three distinct phenotypes can be identified by mean of biochemical tests. Among 1000 Britishe
Question 1: Briefly explain the applications of various technologies in biotechnology. Definition of biotechnology Brief on different applications of various technolo
A disulfide bond can form between any two amino acids that have sulfur in their side-chain.
Variety of Locomotion A number of animals are sendentary, remaining attached to some substratum. These animals may move parts of their body but this does not result in the mov
why obelia shows an intermediate grade of organisation
MULTIPLE ALLELES (i) More than two alternative forms (alleles) of a gene in a population occupying the same locus on a chromosome or its homologue are known as multiple
What is the structure that maintains identical chromatids bound? Ans) The structure that handles identical chromatids bound is the centromere.
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