that practical teacher don't know how to answer that question

I meet a pratical teacher in my school.She still study in Unversiti Putra Malaysia.She's from Kluang,Johore.Her hometown is i ask after the day i ask her to teach me.That day she goes into my class and relieve only.I saw her bringing along with a biology reference book.That time i was bored to continue with the invention design project paper work and i take out the notes that the biology tuition teacher given.I'm trying to do the question that prepared by that teacher and i got stuck in one of the question.I walk to the front and i ask her and hoping she can give some explaination.But sadly she tell me she do not know how to solve that question.Before asking her the question that i need help on,i ask her before which chapter she mastered the best.But she just tell me that she master all with the same level only.That question was about a dihybrid inheritence.The question given that the offspring genes and what i need to do was find out the parents genes.What a tough quetion.I still couldn't find the way to solve.