well if gold is dominate, lets call it G, and white is recessive, lets call it g. the big G always over powers the little g. if the G molly is a GG, meaning it has two dominate traits in its mother anf father chromosomes. and the female is a Gg meanign one os the parents had a recessive trait in its genes. you would get all Gold mollies.. you can do this by squaring them
however you can get some recessive from two gold mollies.
so for every 4 mollies yhe ration could be 3 gold for every white.
though.. there are some traits that blend... like white and red roses make pink roses..