Computer simulations are sometimes used to demonstrate the outcome of monohybrid fruit fly crosses, where a student can run generation after generation of fruit flies with 100 offspring produced each generation, half male and half female, and a 3-to-1 phenotype ratio (or 75 to 25) in the F1 generation. Compared with real genetics results:
a. rarely would exactly 100 fly offspring be produced or survive.
b. an exact balance between males and females would be rare.
c. a precise 3-to-1 ratio would be uncommon.
d. All of the choices are true.