Test: GRE Subject Test: Biology

1.

Consider the following scenario:

Gene-Z is a transcription factor required for transcribing the genes that contribute to populating the motor cortex with the proper number of neurons. Mutant mice for Gene-Z have 50% fewer motor neurons than controls (non-mutants). You genetically engineer a transgenic DNA construct that acts as a dominant negative to Gene-Z.

You transfect an embryonic mouse brain with this dominant negative and measure that all motor neurons get and expressed this construct. What would you expect the number of neurons in the transfected brain to be if the dominant negative works with 100% efficacy, and a normal motor cortex has 100,000 cells in the region you are examining?

1/2 questions

0%

Access results and powerful study features!

Take 15 seconds to create an account.
Start now! Create your free account and get access to features like:
  • Full length diagnostic tests
  • Invite your friends
  • Access hundreds of practice tests
  • Monitor your progress over time
  • Manage your tests and results
  • Monitor the progress of your class & students
By clicking Create Account you agree that you are at least 13 years old and you agree to the Varsity Tutors LLC Terms of Use and Privacy Policy.
Learning Tools by Varsity Tutors