you have genes for red hair, blue-ish green eyes, a facial structure that looks like X, or Y, and a skin tone of Z. with a reasonable degree of accuracy you ca

you have genes for red hair, blue-ish green eyes, a facial structure that looks like X, or Y, and a skin tone of Z. with a reasonable degree of accuracy you can then predict what that person looks like. epigenetics and other factors make that something like a "best guess" approximation, but it is a good start.