1 Heredity: All living things have DNA and genetic information codes the structure and function of all cells. 2  Equilibrium: All living things must maintain homeostasis, a state of balanced equilibrium between the organism and its environment. 3  Evolution: This is the overall unifying concept of biology.
Bicolor crested geckos are generally patternless but with a slightly darker â sometimes lighter â color on their dorsal (top of head and back). Bi-color is usually seen in red, orange, olives and buckskins.Some bicolors have a hint of a pattern on the dorsal, but lack the cream of flame morphs (see below).hink of crested gecko morphs as dog breeds â when you breed dogs from two different breeds together, you do not have a 25% chance of getting a full Labrador or Pug and 50% chance of getting Labs that carry Pug genetics.
Conjunctivitis. Also known as  pink eye , conjunctivitis is the inflammation of the pink part that surrounds your leopard gecko's eye. This pink to red, fleshy part is called the conjunctiva. Leopard gecko eyes usually get bacterial conjunctivitis and require an antibiotic eye drop or ointment.lcers. When something gets stuck in your gecko's eye, such as bedding, or other trauma occurs to the eyeball itself, damage to the cornea can occur and an ulcer can result. An ulcer is basically a hole in the cornea and it can be a small spot or cover the entire eye.