Mullerian duct morphology trait Any measurable or observable characteristic related to the shape, structure, color, or pattern of the transient embryonic tubes that empty into the cloaca and in the female develop into the oviducts, uterus, and vagina. paramesonephric duct morphology trait Muller duct morphology trait VT:0003826 Trait.ontology ATOL:0000487 reproductive system development trait