Here is basic Sketch showing what types of dragons there are and other genetic related facts

There are 5 types of dragons there are more base on what other genetic differences they have

Normal/Balanced, Heavy-Scale, Flyer, Naga/Serpent, Lung


Dragons are seem to be on or the only species that is unaffected by genetic "mutation" in there words. Many arms, legs, wings and tails the most intersecting is Dragons with many heads. Extra Heads do not have any brains by a organ that can act similar to the brain comes with several nerves contend to the main spine and brain stem of the Dragons main. Even though dragon haves more heads its still the same dragon the extra heads are simple made of memories and thoughts of the Dragon as well if the main head is lost or killed the body and extra heads will die as they are not made like the main head. Other facts are theirs always an odd number of heads which would more likely be to balance out the rest of the dragon and if the extra heads have time, are health and given training and lessons the extra heads can become other dragon however this is rare to see and more like the extra heads need to be removed from the stem and spine.

Dragons don't normal have horns but scales and cartilage, though that does removed they look like they have horns. This spikes, horns, spike like hair are harden scales which is similar to hair to humans but given them more use out of it then possible given warm from human hair and just like hair dragons can cut them off. Horns are seen in Dragons but this is more an effect of old dragons where having horns increases survive and gives them a weapon, thankfully Dragon horns are smaller, curving more and some cause with harden up in danger

Other factors dragons have are more effected by the element within. Metal Dragons have increases of Iron in there body which can lead to there outer most scales becoming a form of metal armor to protect the dragon, the metal is not sharp and cold as dragons control it. Metal Dragons do need to change there metal scales ever 2 mouths to give the body to relax and cool and in some causes Metal Dragons can reuse there old metal scales affect changing, cleaner, and removing unneeded pieces. Water dragons have webbed feet and hands better for water and some Air dragons have them too from improved flying. Pointed Tails come in 2 types, harden forms made for smashing or fighting are harden scales and seen on most heavy dragons or to few types like Earth and light form which is more for utility and support in dragons daily needs like grabbing or holding object some element types can also have tails like psychic types

Dragon can have 1 of 3 eye styles which dont limit the dragons sight in anyway but improve in some areas, how some dragons can see its hard however not impossible as some creatures on earth can do the same. These styles (Left to Right) are General, Slit, and Blank.