A: Due to the bottleneck effect,among the sur | vedclass

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(C) The bottleneck effect is a sharp reduction in the size of a population due to environmental events or human activities,which results in a signific

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Assertion is correct,but Reason is incorrect.

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(C) The bottleneck effect is a sharp reduction in the size of a population due to environmental events or human activities,which results in a significant decrease in genetic variability.Because the survivors represent only a small,random sample of the original population,certain alleles may become overrepresented,underrepresented,or completely lost (eliminated) from the gene pool.This loss of genetic diversity makes the population more vulnerable to extinction,but the statement that the path of extinction cannot be reversed 'due to the bottleneck effect' is scientifically inaccurate.Extinction is an irreversible process by definition,regardless of the bottleneck effect,and the bottleneck effect itself describes a change in allele frequencies,not the impossibility of recovery or the definition of extinction.Therefore,the Assertion is correct,but the Reason is incorrect.

$A$: Due to the bottleneck effect,among the survivors,certain alleles may be overrepresented,some may be underrepresented,and some alleles may be totally eliminated.
$R$: The path of extinction of a species cannot be reversed due to the bottleneck effect.

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$A$: Due to the bottleneck effect,among the survivors,certain alleles may be overrepresented,some may be underrepresented,and some alleles may be totally eliminated.$R$: The path of extinction of a species cannot be reversed due to the bottleneck effect.