Usecase for MGX

Student starts application. System displays GUI containing pool of creatures (zoo) plus access to three labs (modes).
Student chooses to work in virtual genetics lab I (VGL) mode. (This is the default mode on application startup.) System displays VGL mode GUI.
Student working in VGL mode selects one creature. System displays (enables) control(s) for mutating genes.
Student working in VGL mode selects two creatures. System displays (enables) control(s) for crossing (mating) these creatures.
Student working in VGL mode crosses two creatures (already selected). System displays all offspring.
Student chooses to work in virtual genetics lab II (GENEX) mode. System displays GENEX mode GUI.
Student working in GENEX mode selects one creature. System displays editable copies of DNA, RNA and protein for two genes (alleles). [NOTE: We need to ask Professor White how student will edit these copies of DNA, RNA and protein.]
Student chooses to work in biochemistry lab (PROTEX) mode. System displays PROTEX mode GUI.
Student working in PROTEX mode selects one creature. System displays editable copies of polypeptide chain (linear and folded) plus function (color) for two genes (alleles).
Student working in PROTEX mode and selecting one creature adds one amino acid to the existing polypeptide chain of one gene. System folds the modified polypeptide chain, and displays its altered function.
Student working in PROTEX mode and selecting one creature removes one amino acid from the existing polypeptide chain of one gene. System folds the modified polypeptide chain, and displays its altered function.
Student exits the application. System saves its state and quits.