Why is it difficult to eliminate a recessive allele that expresses a detrimental trait?

It is difficult to eliminate a recessive allele that expresses a detrimental trait because the carriers are usually asymptomatic & the disease is not phenotypically expressed until it is present as a homozygous pair.

This has been one of the many challenges of Eugenics.

Explanation:

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explanation:

the higher the instrument the better

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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