Traits

A mutation which allows the character's body or traits to be asymmetrical, or for traits to appear only on one side of the body. ie. a bunbii with one atlas wing and one dragonfly wing. 

One Bio Asymmetry trait on a character allows you to make as many of their traits one-sided as you like.

Exceptions: Does not apply to irribask as they have asymmetry at the Rare level. 

(Has no relation to markings! Asymmetrical markings are free and you don't need a trait item for them)