Type A is dominant, Type O is recessive. In otherwords your parents could both carry the gene for O, but the A gene they carry overrides it. You just got the O gene from both of them and not the A. It works like this, imagine your mom's genes across the top, and your dad's down the side. They each give you only one.
Chrysopelea, more commonly known as the flying snake or gliding snake, is a genus that belongs to the family Colubridae. This flying snake species reaches up to three feet in length and is popular in the European pet trade. Their bodies are black, but covered in rich green scales. Clusters of red, orange, and yellow-coloured scales in the shape of flower petals line the dorsal area from the base of the neck to the tail.
Though it is called the golden tree snake, there are other colour variations; for example, some phases tend to lean towards lime green in colour rather than pure yellow, while in India, it has orange to red markings and small black bars on the dorsum, almost as rich in colouration as the paradise tree snake.win-barred tree snake or banded flying snake, Chrysopelea pelias. : This is the smallest flying snake species, reaching up to two feet in length. Its base colour is black or dark grey, and the entire body is covered with thick red and thin yellow with black bands.