The Graph Below Shows the Normal Concentration of Morphogens a and B

question 58

Multiple Choice

The graph below shows the normal concentration of morphogens A and B throughout a Drosophila embryo.

If morphogen B is injected into the head end of an embryo,the embryo is likely to develop

• A) normally.
• B) a second tail at the head end.
• C) a second head at the tail end.
• D) two heads at the head end.

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