I want to know the answer to the following question:
What is appearance a poor indication of?
All the background I'm provided with is that "That is, race referred preferentially to appearance, not heredity, and appearance is a poor indication of ancestry, because only a few genes are responsible for someone's skin color and traits: a person who is considered white may have more African ancestry than a person who is considered black, and the reverse can be also true about European ancestry.". Is that enough to answer the question?