贫血症

• The sickle cell mutation today can be found in five different haplotypes , leading to the conclusion that the mutation appeared independently five times in five different founders . ( although sickle cell disease usually results from a founder mutation , some cases do arise from other mutations
  科学家发现，现今的镰状细胞突变分别座落于五个不同的单纯型之中，显见这种突变曾独立出现过五次，各自发生在五个不同的创始者身上（虽然镰状细胞贫血症通常是因创始者突变，但也有些病例是其他不同的突变所造成的） 。