Problem: Genetic counsellors would meet with new parents who want to have children in order to analyze and discuss probabilities of their offspring having certain recessive diseases. Many decades ago, before molecular analysis techniques, they would need to look at several past generations. In those times, how do you think the analysis of the probability of their child having a dominant disorder would have differed from this, if at all (perhaps they also need to look generations back). Explain your answer briefly in a few sentences