Each module includes:

• A document describing the related genetics.
  
• Instruction on completing the problems
  
• Between 4 and 20 problems to solve
  
• Note: You can only complete each problem once.

You can work at your own pace:

• The GCT keeps track of your progress, so you do not need to complete a module in one sitting.
  
• You can log out at any time. When you log in again, the GCT will start you at the beginning of the problem on which you left off.