A population will not exist in Hardy-Weinberg equilibrium if

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the population is large

individuals mate selectively

there is no migration

there are no mutations

answer is C.

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Detailed Solution

A population will not exist in Hardy-Weinberg equilibrium if individuals mate selectively.
According to the Hardy-Weinberg equilibrium, the frequencies of alleles and genotypes in a population will remain constant if certain conditions are met.
These conditions include:
1. Population size is large.
2. No large scale migration
3. No change in allelic frequencies due to mutations
4. No differential reproductive success (no natural selection)
5. Mating is random.
If individuals in the population mate selectively/preferentially, it can lead to an uneven distribution of alleles in subsequent generations, resulting in deviations from the Hardy-Weinberg equilibrium.
(1) No migration is a condition for the maintenance of Hardy-Weinberg equilibrium.
(2) Large population size favours maintenance of Hardy-Weinberg equilibrium.
(4) Absence of mutations helps maintain Hardy-Weinberg equilibrium since there would be no change in allelic
Frequencies due to mutations.

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