试题与答案

番茄营养丰富,是人们喜爱的一类果蔬。但普通番茄细胞中含有多聚半乳糖醛酸酶基因,控制细

题型:填空题 案例分析题

题目:

番茄营养丰富,是人们喜爱的一类果蔬。但普通番茄细胞中含有多聚半乳糖醛酸酶基因,控制细胞产生多聚半乳糖醛酸酶,该酶能破坏细胞壁,使番茄软化,不耐贮藏。为满足人们的生产生活需要,科学家们通过基因工程技术,培育出了抗软化、保鲜时间长的番茄新品种。(操作流程如图)请回答:

利用基因工程进行育种,可以培育出具有新性状的植株,这种育种方式的优点是:

①();

②()。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:对

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题型:填空题

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