WB JEE Medical WB JEE Medical Solved Paper-2013

  • question_answer
    Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as

    A)  genetic flow

    B)  genetic drift

    C)  random mating

    D)  genetic load

    Correct Answer: B

    Solution :

     Genetic drift is a random change In aiiele frequencies over the generations. It is brought by chance alone. Gene flow or gene migration is the physical movement of alieles into and out of a population. The existence within the population of disadvantages alieles in heterozygous genotypes is known as genetic code.


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