Would you say that...

you physically resemble your mother more or your father?

My claim is that evolutionary psychologists suggest that people are more likely to say that a child resembles the father—apparently so that the father will be more likely to protect and care for the child. I am trying to demonstrate that even though in modern times, more people are likely to say that they resemble their father. So, I plan to ask 100 randomly selected students (ignoring the obvious gender differences) if they most resemble their mother or their father. For each gender, I will test the null hypothesis that p = 0.5 and by performing a chi-squared test for homogeneity.

my mother

I don't know who my biological father is, but I know that I've seen old photos of myself and thought it was mum and vice versa

I would say my father because I have some very obvious Eastern Mediterranean features I inherited from him. OTOH, my skin is as light as my mother's. But maybe I ignore that because I live in a Northern European country where everybody has light skin, so I consider that a "neutral" feature.