Eye color in humans pretty closely follows the Dominant/recessive allele characteristics from classic Mendelian genetics. If you show me a person's family tree

Eye color in humans pretty closely follows the Dominant/recessive allele characteristics from classic Mendelian genetics. If you show me a person's family tree and I notice that all 4 of their grandparents have brown eyes I can predict with almost total certainty (barring new mutations or epigenetic effects) that they will have brown eyes. other combinations of eye color at the grandparents lead to predictable distributions of the expression of that trait in the grandchild generation. this may be what was meant by "random variable", but it's really a population effect so modeling it as a random variable is peculiar. it's not random at the level of the individual, or at least it isn't after the recombination phase of fertilization in the embryo. given a genetic sample of an individual it is totally predictable what their eye color will be based on examining their genes. I don't see how this is begging the question.