hi everyone,
i am not familier with the world of biology and i was asked in one of my courses to analyze the relationships of 4 genes and wether or not its fit its species it belongs to... do you have an idea of which kind of analysis i should use? i was thinking at first on analysing contingency table using log linear method but the problem is that this are a lot of structural zeros that can not be replaced...
any other approach?

thanks for your help