When you study heredity, you need to be able to compare generations. in this lab, you will compare different generations of mice. the original mice that you cross are called the offspring from that cross are called

first generation maybe im not a big biology freak and the second might be second generation im not super sure but srry if its not but its worth the shot :p

P generation, Then the second choice is F1 generation

Explanation: and if you get an extra third question with it like i did then that will be F2 generation :)