Thalassemia is a serious human genetic disorder that causes severe anemia. People with thalessemia die before sexual maturity. The homozygous condition, TmTm, leads to severe anemia. The heterozygous condition, TmTn, causes a less serious form of anemia. The genotype TnTn causes no symptoms of the disease. What are the possible genotypes and phenotypes of the offspring if a TmTn male marries a TmTn female?