Dec '13
31
MCAT Question of the Day | MCAT Course


  • Q:

    Morphogens are extracellular molecules that govern tissue development and specialization during morphogenesis. Which of the following experiments would NOT constitute support for the existence of morphogens?

     

    A

    Two cells on opposite ends of the morula are switched, causing no developmental difference.

    B

    A single cell is removed from the morula, causing the embryo to suffer a significant morphological deformity.

    C

    Creating blockers for hypothesized morphogen receptors causes tissue differentiation to stop.

    D

    Selective activation of developmental genes increases in frequency as the distance from a particular location in the embryo decreases.




    Tags: Embryonic Development | Suggest a tag
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