A man with blood type B marries a woman with blood type A. They have a child with blood type 0. What are the genotypes of the father and the mother. What is the genotype and phenotype of the baby?

Which of the following can occur to two segments of a population if they are geographically isolated 1.) they can only share some types of genes 2.)both groups most likely become extinct 3.)they find a way to come back together 4.)eventually they become separate species