slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Genetic mutations —— Evolution of intrinsic motivation PowerPoint Presentation
Download Presentation
Genetic mutations —— Evolution of intrinsic motivation

Loading in 2 Seconds...

play fullscreen
1 / 13

Genetic mutations —— Evolution of intrinsic motivation - PowerPoint PPT Presentation


  • 84 Views
  • Uploaded on

Genetic mutations —— Evolution of intrinsic motivation. 生物体的基因组 DNA 并不稳定,经常会出现各种各样的可遗传的改变,在子代留下变异的遗传信息。这种可遗传的基因中 DNA 的改变,就成为基因突变( gene mutation )。. AAGCTGGAAGTG. AAGCTGGAAGTG. AAGCT T GAAGTG. AAGCT A GAAGTG. 碱 基 替 换( Base substitution ). 转换 transition G A C T

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Genetic mutations —— Evolution of intrinsic motivation' - kiayada-blanchard


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Genetic mutations

——Evolution of intrinsic motivation

slide3

AAGCTGGAAGTG

AAGCTGGAAGTG

AAGCTTGAAGTG

AAGCTAGAAGTG

碱 基 替 换(Base substitution)

转换transition G A C T

(嘌呤变为另一种嘌呤或嘧啶变为另一种嘧啶)

碱基替换

颠换transversion A /G T/C

(嘌呤变为嘧啶或嘧啶变为嘌呤)

slide4

AAGCTGGAAGTG

AAGAAGGTCGTG

inversion

inversion

slide6

AAGCTGGAAGTG

ATGGAAAGCGTG

translocation

slide7

insertion

AAGCTGGAAGTG

AAGCTG GTG

slide8

AGCTGGAAGTG

CTGGAAGT

AGCTGGTG

CTGGAAGAAGT

slide9

Base conversion

Base substitution

Base transversion

Base sequence change

Base arrangement change(Inversion and translocation )

Genetic mutations

insert

missing

Base number change

repeat

slide10

insert

missing

repeat

inversion

translocation

slide11

同义突变(same sense mutation)

是指DNA组成变了,但密码子没有改变,或密码子虽然不同,但编码产生同一种氨基酸,这种突变又称中性突变。

错义突变(missense mutation)

是指DNA组成改变使编码一种氨基酸的密码子改变成编码另一种氨基酸的密码子。

无义突变(nonsense mutation)

是指某一碱基的替换使氨基酸密码子变为终止密码,可过早地终止转录,形成无活性的肽链。

slide13

移码突变(frameshift mutation)

DNA链上插入或缺失一个或几个核苷酸,使下游密码子阅读框发生变化,导致在插入或缺失部位以后的编码发生相应的改变。

终止密码突变(termination codon mutation)

当DNA分子中一个终止密码发生突变,成为编码氨基酸的密码子时,多肽链的合成将继续进行下去,肽链延长直到遇到下一个终止密码子时方停止,因而形成了延长的异常肽链。这种突变又称为延长突变(elongtion mutation)。

沉默突变(silent mutation)

仅改变表达产物中的单个氨基酸,对蛋白质的生理功能没有影响的点突变。 是形成蛋白质多态性的主要原因。