In the quest for what may be a more appropriate term, I have come upon "autosomal dominate"...and I don't know WHY I didn't think of it before (I have a genetic disorder that is autosomal dominate, giving my baby a 50% chance of also having it). In the case of autosomal dominance, there is a visible phenotype for the heterozygous form, but the homozygous form would be identical (instead of seperate in the case of incomplete dominate).
From Answers.com (just substitute gecko for person):
"A pattern of inheritance in which only one of the two copies of an autosomal gene must be abnormal for a genetic condition or disease to occur. An autosomal gene is a gene that is located on one of the autosomes or non-sex chromosomes. A person with an autosomal dominant disorder has a 50% chance of passing it to each of their offspring."
http://www.answers.com/main/ntquery;...mal%20dominant