Allele :D
Allele is the term that describes the form of a gene that produces a specific trait such as long feathers or short feathers. Traits are passed in discrete units from parents to there offspring.
I believe it is a trait.
True-breeding
Recessive
DNA determines a specific trait.
A trait is an inherited characteristic of an organism. One example is eye color. When a gene codes for the trait "brown eye color" we mean that the person has proteins in her eyes that are shaped to reflect the brown color. The reason she has those particular proteins is because she has the gene that is the instructions for those specific proteins. So: the gene is the instruction to make the protein that is the expression of the trait.
Heterozygous
a true breeding plant always produces offspring with the same trait as the parent(s).
incomplete dominance
Honest
Adaptation
A trait that is beneficial to survival.