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J & K CET Medical J & K - CET Medical Solved Paper-2012

  • question_answer
    An isolated population of humans with approximately equal numbers of blue-eyed and brown-eyed individuals was decimated by an earthquake. Only a few brown-eyed people remained to form the next generation. This kind of change in the gene pool is called a

    A)  Hardy-Weinberg equilibrium

    B)  blocked gene flow

    C)  bottleneck effect

    D)  founder effect

    Correct Answer: C

    Solution :

     Population may sometimes be reduced to low numbers by predation, diseases, adverse period of climatic changes. Earth quakes, floods, etc. The few surviving individuals may constitute a random genetic sample of the original population. The resultant alterations and loss of genetic variability is known as bottleneck effect.


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