Put it this way. Unless the other person is relatively close to
you in terms of lineage, sibling, immediate cousins, etc, it is
unlikely that anything bad will come out of it.
Checking your chromosomes might be one way of making sure that the
risks of having a child with hereditary problems are reduced. But
you must remember after the knowledge and the percentages, its will
become and live probability demonstration at the end of it, so
simply put, shit might still happen.