高中生物同步课件：23伴性遗传1人教版必修2

高中生物同步课件：23伴性遗传1人教版必修2内容摘要：

，就会表现出色盲。 Pedigree of an XLinked Recessive Trait Colorblindness 1 2 Queen Victoria (18191901) Queen Victoria of England was a carrier of the geneor hemophilia. She passed the harmful allele for his Xlinked trait on to one of her four sons and atleast two of her five daughters. Her son Leopold hadthe disease and died at age 30, while her daughterswere only carriers. As a result of marrying into other European royal families, the princesses Alice andBeatrice spread hemophilia to Russia, Germany, andSpain. By the early 20th century, ten of Victoria39。 sdescendents had hemophilia. All of them were men •血友病 (haemophilia)“皇家病” X染色体隐性遗传的特点 1)男多于女 2)隔代交叉遗传 3)某男患病，其母和女至少是携带者 4)某女患病，其父和儿肯定患病 •I1 = King Gee III •III1 and III2 = Prince Albert and Queen Victoria •IV5 and IV6 = Alice of Hesse and Ludwig IV of Hesse •V13 and V14 = Alix and Nicholas II (Tsar of Russia) •VI16 = Alexei •VIII1 = Prince Charles A Pedigree of Hemophilia in the Royal Families of Europe 伴 X隐性遗传 ：男多于女 母病子必病，女病父必病 autosomal dominant mode of inheritance——Matings between affe。