What do you mean, niece looks like aunt and nephew looks like uncle?

There used to be a saying that nephews look like uncles and nieces look like aunts, because besides parents, nephews look like uncles and nieces look like aunts.

Genetically, there is only reproduction, so men will look like uncles. This is one aspect. The second is to explain from the perspective of qualitative genes. Your mother and your uncle inherited grandma's qualitative genes, and your mother passed them on to you.