Tiger is a Co-Dominate gene that stretches, cleans, and brightens pattern in Retics, while maintaining everything that makes the Retics so unique.  The homozygous form of this gene is known as SuperTiger, which often is completely striped from head to tail.  This is an extremely variable gene, which often produces unexpected results when combined with other morphs, and is the favorite base morph of quite a few Retic enthusiasts, and has long held a special place in their hearts.