Fertilisation of two differnt cells?

i came across a question while studying for my science test.in fertilisation we know that it is important for e.g human cells to have 23 chromosomes each so that it makes 46 when it has fertilised.but suppose we fertilised two human cells which through some kind of controlled experiment contained all 46 chromosomes.so the zygote would have 92 chromosomes.would the zygote still be human?or would it be another animal?or would it turn out to be an abomination of some kind??