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A small amount of lethal mutation is always present in the population due to
  • a)
    Positive selection
  • b)
    Negative selection
  • c)
    Frequency-dependent selection
  • d)
    Mutation-selection balance
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A small amount of lethal mutation is always present in the population ...
A small amount of lethal mutation is always present in the population due to mutation-selection balance.
Mutation-selection balance refers to the equilibrium reached between the introduction of new mutations through genetic variation (mutation) and the elimination of deleterious mutations by natural selection (selection). In any population, mutations continuously arise and can include lethal or severely detrimental mutations.
While natural selection acts to remove harmful mutations from the population, it cannot completely eliminate them because new mutations are constantly occurring. Therefore, a balance is established where the population carries a small number of lethal mutations at any given time.
This concept highlights the ongoing dynamic between the introduction of mutations and the selective pressures that act upon them, resulting in the presence of a baseline level of lethal mutations in the population.
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A small amount of lethal mutation is always present in the population due toa)Positive selectionb)Negative selectionc)Frequency-dependent selectiond)Mutation-selection balanceCorrect answer is option 'D'. Can you explain this answer?
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