Collect the labsheet and assess students' understanding of traits produced by the various cross breedings.

You may also use the following ideas for assessment:

• Students could write a letter to a friend about their "discovery" in which they have to explain the experiment, describe their conclusion, and give support for their findings based on their observations. 

• Give students a printed copy of a screen shot of Mouse Genetics in which a breeding trial has been performed and ask them to provide a written comment on what has happened and explain how they know.  You can vary this assessment by changing the type of information left out of the shot. For example, you could have the offspring circles filled and the counter showing results but have the parents unknown. The students would then be required to identify the parents and explain data that supports their answers.