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    Hi all,

    Have been debating the answer to this question as the wording is very dodgy - can someone give me a hand? Many thanks!

    For two mutations, A and B, what does “A is epistatic to B” literally mean?

    a. The double mutant AB has the same phenotype as A
    b. Gene B acts downstream of A
    c. Gene A inhibits gene B
    d. All of the above

    Many thanks!
 
 
 
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Is the Big Bang theory correct?

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