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&ensp;&ensp;&ensp;&ensp;唐氏综合征（又称先天愚型或21－三体综合征）属常染色体畸变，是小儿染色体病中最常见的一种，活婴中发生率1／600～1／800，母亲年龄愈大，。下面小编给大家分享染色体平衡易位是病吗，希望能帮助到大家。 染色体平衡易位是病吗文档下载网址链接：</div></div><div class=\"download_card_btn download_card_btn_lb\"><div class=\"content_box_tj\"><span>推荐度：</span><img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\"></div><div class=\"downlod_btn_right demo_tc downlod_btn_right_lb\"><em class=\"downlod_icon\"></em>点击下载文档<span>文档为doc格式</span></div> </div></div></a>';
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