包邮遗传学-第三版-导读版

本书特色

《遗传学(英文)(导读版)(第3版)》：快速、准确掌握专业知识和专业外语的*佳套书！一种对教材概念的新的诠释！精炼学科核心内容，以相对独立又互相关联的专题形式介绍各学科基础知识。版式设计独特，方便学生快速、便捷地领会学科要点，便于复习与记忆。编写风格统一，提供“结构化”学习方法。世界范围内的主流教材——欧洲、北美等地众多高校广泛参考和使用，国内数百家高校双语教学课程选用。精要速览系列图书1999年面世至今受到广大读者的关注，2009年科学出版社隆重推如11个分册导读版的新版图书，2010年计划推出9个分册的中译版。其编写风格、取材角度仍继承前版特色，在内容上根据各学科发展进行修订和扩充。

内容简介

简介 　　“精要速览系列(instant notes series)”丛书是国外教材“best seller”榜的上榜教材。该系列结构新颖，视角独特；重点明确，脉络分明；图表简明清晰；英文自然易懂，被国内多所重点院校选用作为双语教材。　　 第三版在第二版基础上进行修订。对人类基因研究、rna调控、组蛋白修饰、表观遗传学、人类进化等新近研究进行重点补充和调整，其他各章节也进行了修订。　　 本书适合普通高等院校生命科学、医学、农学等相关专业使用，也可作为双语教学参考教材使用。

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插图：The DNA sequence of a gene determines the amino acid sequence of its encodedprotein. It is very important that the DNA sequence is preserved because alter-ations to the amino acid sequence may affect the ability of the protein to function,which in turn may have a deleterious effect on the organism. Alterations to theDNA sequence do occur as a result of the action of a number of chemical andphysical agents on DNA and also due to rare errors in DNA replication. Thesechanges are known as mutations. Once introduced, the DNA sequence changesare made permanent by DNA replication and are passed on to daughter cellsfollowing cell division.Two important terms that describe an organism carrying a mutation are 8eno-type and phenotype. Genotype is used to describe the mutation and the gene itoccurs in. Phenotype describes the effect on the organism of the mutation. Anorganism that displays the usual phenotype for that species is called the wild-type. An organism whose usual phenotype has changed as the result of amutation is called a mutant. Mutations occur in two forms: point mutationswhich involve a change in the base present at any position in a gene, and grossmutations which involve alterations of longer stretches of DNA sequence. Thelocation of the mutation within a gene is important. Only mutations that occurwithin the coding region are likely to affect the protein. Mutations in noncodingor intergenic regions do not usually have an effect.Point mutations fall into a number of categories, each with different consequencesfor the protein encoded by the gene.Missense mutationsThese point mutations involve the alteration of a single base which changes acodon such that the encoded amino acid is altered （Fig. la）. Such mutationsusually occur inone of the first two bases of a codom The redundancy （degen-eracy） of the genetic code means that mutation of the third base is less likely tocause a change in