???independent,dependent,standarized variables?

In my experiment I will take 10 families (mom,dad,2-4 offspring) and have them sample PTC strip & a control strip recording whether they were able taste anything I'm just not sure which is which other then the control strip that has no taste is obviously the control.

Would there be anything to possibly standardize in my experiment other then that it's have to be 10 different but biological families

Update:

my purpose is to see if the ability of tasting PTC strips is in fact a dominant inherited gene

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