Snail Species a Has a Shell That Spirals Counterclockwise,but a Mutation

question 60

Multiple Choice

Snail species A has a shell that spirals counterclockwise,but a mutation has caused some individuals to have a clockwise shell.The genitalia of the two versions are incompatible,leading some scientists to say that the clockwise snails are reproductively isolated.This is an example of

• A) hybrid breakdown.
• B) gametic isolation.
• C) hybrid inviability.
• D) mutational isolation.
• E) mechanical isolation.

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