Good question brotha! Well, due to the fact that this plants genetics are unknown, your chances of knowing what the parent plant genetic make up is very very slim if not zero.
Its not all that feasible to say this plant is a pure XYZ or that plant is a pure ABC. What we can do is deduct what the plant MAY be. By looking at its leaf structure, size stature, and color, we can draw a basic conclusion of the rough make up of your plant.
SATIVA: Typically have very skinny leaf's that are usually very very large. These are the plants that can get up to 12+ feet tall. Very lengthy, and stretchy. They also typically are a lighter green in color. The buds tend to be less dense, and have a very specific high. These usually take a while longer than Indicas to finish flowering. Plant is Native to Central Asia, and long cultivated in Asia, Europe, and China
INDICA: Typically, these are your smaller plants. They have smaller leaves that are very broad or thick. They also typically have a much darker hue of green. They usually finish flowering sooner than sativas. The budz tend to be much denser than sativa. The high is usually a very much head high. Indica's are native to the hindu kush region as well as Afghanistan, Pakistan, and india.
Ruderalis: Is a subspecies of Cannabis Sativa. Cannabis ruderalis is a variety of cannabis that grows wild in parts of Eastern Europe and Russia. It is characterized by its early flowering, with some plants starting irrespective of the photo-period.
Cannabis ruderalis is ideal for cultivation in cooler climates and areas where conditions are harsh.
Hope this helps ya bud. I apologize if I left anything out, I am heavily medicated at the moment. Hope to see some updates from ya soon
Peace, Love, and Happiness