The Function of a Single Fruit Fly Gene Was Inactivated

question 14

Multiple Choice

The function of a single fruit fly gene was inactivated completely by mutation.A fruit fly with this mutation did not have legs.Which is a reasonable conclusion to make based on this information?

• A)The normal gene function is required for viability in fruit flies.
• B)The normal gene function is required for leg formation in fruit flies.
• C)The normal gene is unlikely to regulate other genes involved in leg formation.
• D)The normal gene is likely required in fruit flies for formation of legs, wings, and antenna.

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