You Are Investigating the Function of a Pheromone Receptor Found

question 10

Multiple Choice

You are investigating the function of a pheromone receptor found in the vomeronasal organ (VNO) of mice.You hypothesize that when pheromones produced by a female mouse bind to the VNO receptors of a male mouse, the binding stimulates mating behavior.You test your hypothesis by doing a knockout experiment, silencing a gene needed for the VNO receptor to work.When you expose the knockout male mouse to a female mouse, the knockout mouse mates with the female.When you expose the same knockout male mouse to a male mouse, the knockout mouse tries to mate with the male.When you test a normal male mouse under the same situations, the male mates with the female, but reacts aggressively toward the male.What conclusion can you draw from these results?

• A) There is a single gene that controls mating behavior in male mice.
• B) The VNO receptors are necessary for gender identification.
• C) The VNO receptors are necessary for mating behavior.
• D) The VNO receptors are necessary for sexual attraction.
• E) Male mice cannot distinguish between male and female mice.

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