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What effect does natural selection have on allele frequency at one locus in a population of...

What effect does natural selection have on allele frequency at one locus in a population of diploid organisms of finite size?

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Natural selection is a process which helps in the selection of alleles as per their role in an organism.

If the allele is beneficial for the organism then it is positively selected and remains in the population and with the course of time, the allele get fixed in the population.

But if the allele is harmful for the organism, then it is negatively selected and with the course of time, it is lost from the population.

So, at every locus, where there are two alleles, one of the allele will be fixed in the population and the other allele will be lost from the population with the course of time.

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