Protecting Saved Seeds

As a home gardener I am also a seed saver.  Seeds can be saved from any plant but heirlooms are preferred as they breed true unlike seeds from hybrid plants.  Really from a genetic perspective if you cross two hybrids you have a 25% chance of the resulting plant being true for either of the homozygous traits but a 50% chance of it it being nothing like the parental plant.  I grow and save