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桑群群2660中国克隆技术的成果
邹哗洁13245927979 ______ 1952年:科学家证明,他们能把细胞核从一枚青蛙卵子中取出,然后把另一个青蛙胚胎细胞的细胞核注入这个卵子中,并让这个卵子孵化为一条蝌蚪.这种“核转换”可以把一个动物的基因注入一个卵子.这条蝌蚪就是提供了细胞核的那个胚胎...
桑群群2660我国第一只克隆羊是在那一年出生 -
邹哗洁13245927979 ______ 1996年7月5日
桑群群2660中国的克隆技术 -
邹哗洁13245927979 ______ 克隆简介 自从 1997 年2月23 日国外新闻媒介报导 ( 正式科学论文发表在 1997 年2月27 日出版的《自然》杂志上 ) 苏格兰科学家利用体细胞培养克隆羊成功的消息后,在全世界引起了一阵冲击波,我...
桑群群2660克隆技术在全世界已有很大的发展,而我国在着方面如何?能不能克隆人?后果将如何? -
邹哗洁13245927979 ______ 克隆2007-03-22 22:31作为新世纪的尖端科学,克隆技术从它诞生的那一刻起就吸引了众多世人的目光.作为世界最大的发展中国家,中国一直在致力于前沿科学的研究.据目前的状况来看,克隆作为新兴的技术在中国得到前所未有的关注而且...
桑群群2660克隆 是谁第一个发现的? -
邹哗洁13245927979 ______ 克隆通常是一种人工诱导的无性生殖方式或者自然的的无性生殖方式(如植物).一个 克隆就是一个多细胞生物在遗传上与另外一种生物完全一样.克隆可以是自然克隆,例如由无性生殖或是由于偶然的原因产生两个遗传上完全一样的个体...
桑群群2660克隆造福人类的例子 -
邹哗洁13245927979 ______ 1. 克隆技术与遗传育种 在农业方面,人们利用“克隆”技术培育出大量具有抗旱、抗倒伏、抗病虫害的优质高产品种,大大提高了粮食产量.在这方面我国已迈入世界最先进的前列. 2. 克隆技术与濒危生物保护 克隆技术对保护物种特别是珍稀...
桑群群2660进啊进啊~是化学哦~~~下列科学研究成果是我国科学家在世界上首先
邹哗洁13245927979 ______ 1啊! (1)从1958年开始,中国科学院上海生化研究所、上海有机化学研究所和北大生物系叁个单位联合成立一个协作组,开始探索用化学方法合成胰岛素.1965年9月7...