Unit2 Cloning reading精品课件(新人教选修8)
Unit2 Cloning reading精品课件(新人教选修8)第5页

Background:

AD5000:grain seed selection (谷物选种) In 1952:Clone tadpole(克隆蝌蚪) In 1972: Gene replication (基因复制) In 1978: 1st test-tube baby(试管婴儿) In 1997:1st mammal Dolly(多利羊) In 2000:Clone monkey (人类近亲被克隆) In 2001:Clone Humans? (克隆人?)