MCAT Question of the Day
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    Q:

    		 During replication of the human genome, if a frameshift mutation occurs in one of the earlier genes, will the downstream genes be directly affected by the frameshift?
    		 

    A

    		 Yes, because a frameshift mutation affects the reading of all downstream nucleotides.

    B

    		 Yes, because frameshift mutations increase the likelihood of downstream mutations.

    C

    		 No, because frameshift mutations correct themselves automatically after 10-100 nucleotides.

    D

    		 No, because the reading frame of downstream genes is unaffected since each has its own promoter which defines the reading frame.



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