克隆羊多利的诞生,表明人的克隆完全是可能的。而克隆技术一旦应用到人,父子之间、兄妹之间的相互关系将不复存在。这将威胁人类

djtony02142022-10-04 11:39:541条回答

克隆羊多利的诞生,表明人的克隆完全是可能的。而克隆技术一旦应用到人,父子之间、兄妹之间的相互关系将不复存在。这将威胁人类社会现有的法律_______、_______和______。

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众所周之 现在克隆羊等都可以了 但克隆羊多利等等 他克隆出来 能正常的生活 生存就可以 但克隆人就没这么简单 因为决定人的不光是基因 还有环境和主观意志 所以 向爱因斯坦(假如有他完整的DNA的情况下) 因为具说他是晚出生 所以在母亲的子宫里大脑发育的十分发达 我想问的是 假如他的确是这样 那他的DNA会发生改变吗?
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改变DNA的原因很多,特别是在母体内发育时,之所以先克隆动物是因为动物远没人体复杂,一旦克隆出人即使DNA相同外界环境也是个至关重要的决定因素,所以不是克隆出来的都是爱因斯坦...
减数分裂是否重置了生命时钟,为什么克隆羊多利死亡时表现出二十岁羊的特征,而它实际只活了六岁
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这与现在研究的一个名词能挂上关系~端粒、每天染色体上都有固定长度的端粒,而且端粒在每次的减数分裂后就会减少一定的长度,等到端粒的长度减少到无法再进行一次减数分裂的减少的长度时减数分裂就不能再继续课,如果体内细胞大多数都处于这种状态那也就离死不远啦、多利羊没有进行过减数分裂、是只进行有丝分裂进行细胞核的移植而已,所以在多利出生时其体内的端粒已经在供核母羊体内进行过很多次的缩短啦、所以多利只能活这些端粒剩下的那段长度的岁月啦、你把供核母羊供核时的岁数加上多利死时的岁数得出的年龄是一个羊正常的死亡年龄、
进化、遗传、变异如图是克隆羊的培育过程示意图.请回答分析下列问题(1)获得克隆羊的繁殖方式是_______.克隆羊多利的
进化、遗传、变异
如图是克隆羊的培育过程示意图.请回答分析下列问题
(1)获得克隆羊的繁殖方式是_______.克隆羊多利的表现性状与___羊相同,性别是______.其原因是________.若培育克隆羊时,将乙羊换成雄羊,羊多利的性别是_______.
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高中生物书有很详细的彩图
大致就是母羊A的乳腺细胞核与母羊B的去核卵细胞,融合培养,再将所得胚胎移植到母羊C的子宫内,所生下的小羊多利与母羊A有相同的遗传物质,这也充分体现了细胞的全能性
______是指在细胞水平上,有计划地改造细胞的遗传物质结构,培育人类所需要的动植物新品种等的技术.克隆羊多利的诞生标志
______是指在细胞水平上,有计划地改造细胞的遗传物质结构,培育人类所需要的动植物新品种等的技术.克隆羊多利的诞生标志着该项技术取得了重大发展.
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解题思路:细胞工程属于现代技术之一,是近几年考试的一个重点,重点要掌握克隆的原理.

细胞工程是以细胞为对象,应用生命科学理论,借助工程学原理与技术,有目的地利用或改造生物遗传性状,以获得特定的细胞、组织产品或新型物种的一门综合性科学技术.克隆羊多利就是利用细胞工程的最大突破.
故答案为:细胞工程

点评:
本题考点: 生物技术的发展对人类未来的影响.

考点点评: 现代生物技术经常会结合现代的一些实例来出考题,要正确理解才能做对.

1996年英国罗斯林研究所的研究人员以绵羊作为实验材料,进行克隆实验,培育出“多利”羊.克隆羊多利的培育过程如图所示,其
1996年英国罗斯林研究所的研究人员以绵羊作为实验材料,进行克隆实验,培育出“多利”羊.克隆羊多利的培育过程如图所示,其中B羊是一只白色母羊,基因组成为Dd,A羊、C羊均为黑色母羊,基因组成为dd.请据图回答以下问题:

(1)多莉羊毛色为______,这说明遗传物质主要存在于______中.
(2)若多莉羊与一只黑色的公羊进行交配,他们后代的基因组成可能是______.所生后代为母羊的几率是______.
(3)克隆多莉羊的生殖方式属于______.
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解题思路:克隆技术属于现代技术之一,是近几年考试的一个重点,解答时可以从克隆的概念、特点方面来切入.还要掌握克隆羊多利的培育过程以及基因在亲子间的传递规律.

(1)如图,多莉羊的所有性状和B羊一模一样,就是因为B羊为它提供了细胞核,细胞核是遗传的控制中心,是遗传信息库,它里面含有遗传物质,能够传递遗传信息.里面含有控制性状的所有基因.而B羊为白色,则多莉的毛色应该为白色.
(2)因为B羊是一只白色母羊,基因组成为Dd,所以“多莉”的基因也是Dd,而黑色公羊,基因组成为dd.所以它们后代的基因组成可能是Dd或dd,且比例为1:1,所生后代为母羊的几率是50%.
(3)无性生殖是指不需要两性生殖细胞的结合,由母体直接产生新个体的生殖方式.有性生殖是指经过精子与卵细胞两性生殖细胞结合形成受精卵,由受精卵发育成新个体的生殖方式.“克隆”的含义是无性繁殖,即由同一个祖先细胞分裂繁殖而形成的纯细胞系,该细胞系中每个细胞的基因彼此相同.如克隆绵羊“多莉”就是用乳腺上皮细胞(体细胞)作为供体细胞进行细胞核移植的,它利用了胚胎细胞进行核移植的传统方式.克隆技术不需要雌雄交配,不需要精子和卵子的结合,只需从动物身上提取一个单细胞,用人工的方法将其培养成胚胎,再将胚胎移植到雌性动物子宫内,就可孕育出新的个体.因此“克隆”实际上属于无性生殖.
故答案为:(1)白色 细胞核
(2)Dd或dd;50%
(3)无性生殖

点评:
本题考点: 克隆技术的应用.

考点点评: 现代生物技术经常会结合现代的一些实例来出考题,要正确理解才能做对.

克隆羊多利诞生有什么意义最好简洁,一句话概括
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在克隆羊多利中可不可以把提供细胞核的母羊换成公羊
在克隆羊多利中可不可以把提供细胞核的母羊换成公羊
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可以,该实验证明了动物细胞的细胞核仍具有全能性,不管细胞核来自于雌还是雄,培育出的克隆动物绝大部分性状与供核生物相同,性别当然也一样.
克隆羊多利诞生的主要过程?(从细胞分裂具体说起)
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在培育多利羊的过程中,科学家采用了体细胞克隆技术.也就是说,从一只成年绵羊身上提取体细胞,然后把这个体细胞的细胞核注入另一只绵羊的卵细胞之中,而这个卵细胞已经抽去了细胞核,最终新合成的卵细胞在第三只绵羊的子宫内发育形成了多利羊.从理论上而言,多利继承了提供体细胞的那只绵羊的遗传特征.培育多利羊的技术,已经成为如今培育体细胞克隆动物的标准过程
关于克隆羊多利的有关叙述,正确的是(  )
关于克隆羊多利的有关叙述,正确的是(  )
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B.它的产生运用了克隆技术
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解题思路:本题考查的是细胞核在生物遗传中的功能,首先明确细胞核是遗传的控制中心.

克隆技术属于现代生物技术.
在克隆羊多莉的培育过程中,科学家先将甲羊卵细胞的细胞核抽出,再将乙羊乳腺细胞的细胞核取出,将该细胞核注入来自甲羊的无核卵细胞中.这个融合成的卵细胞经过分裂形成胚胎,将这个胚胎移入丙羊的子宫内继续发育.发育成熟后小羊多利出生.因为细胞核内含有遗传物质,能够传递遗传信息,所以,培育出的小羊多莉和提供细胞核的母羊乙一模一样.因此“多莉”与生出它的母羊一模一样的说法错误.
①多莉的诞生证明高度分化成熟的哺乳动物乳腺细胞,仍具有全能性,还能像胚胎细胞一样完整地保存遗传信息,这些遗传信息在母体发育过程中并没有发生不可回复的改变,还能完全恢复到早期胚胎细胞状态.最终仍能发育成与核供体成体完全相同的个体.
②成功地找到了供体核与受体卵细胞质更加相容的方法.克隆动物“多利”问世,证明动物成体细胞的细胞核能够去分化;证明了高度分化的动物体细胞的细胞核仍然保持有全能性.
故选:B

点评:
本题考点: 克隆技术的应用.

考点点评: 关于细胞核与DNA的知识是考查的重点内容,可通过分析细胞核内的遗传物质来掌握,难度一般.

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是母羊,因为多莉是用一只母羊的细胞核植入到卵细胞内培养发育而成,多莉的染色体与该母羊的染色体相同,性别也一样.
克隆羊多利的诞生,表明人的克隆完全是______的.
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克隆羊多利的诞生,不仅在理论上证明了,同植物细胞一样,分化了的动物细胞核也具有全能性,在分化过程中细胞核中的遗传物质没有不可逆变化;在实践上证明了,利用体细胞进行动物克隆的技术是可行的,将有无数相同的细胞可用来作为供体进行核移植,并且在与卵细胞相融合前可对这些供体细胞进行一系列复杂的遗传操作,从而为大规模复制动物优良品种和生产转基因动物提供了有效方法.
故答案为:可能.
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这个事实说明了生物体的遗传信息主要位于细胞核中.
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克隆羊多利的身世证明了遗传信息在以下细胞哪个结构中(  )
克隆羊多利的身世证明了遗传信息在以下细胞哪个结构中(  )
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细胞核:内有染色体,染色体是遗传物质的主要载体,能够传递遗传信息.

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点评:
本题考点: 克隆技术的应用.

考点点评: 解答此题的关键是明确动物细胞的结构和功能.

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(成熟的红色细胞除外)
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求一篇关于克隆羊多利的影响的英文文章,一定要是英文的.
要多利的好的影响,它的出生在科学界的重大影响.
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Cloning Dolly
Cloning Dolly the sheep was not an easy task.To understand how she was cloned,you must first know some of the basics of developmental biology.Here's a crash course:
An 'oocyte' (ooh-oh-sight) is an unfertilized egg that has no chance of becoming an animal unless it becomes fertilized.An egg that has just become fertilized is called a 'zygote' (zye-goat).For example,a frog zygote will split and grow into a tadpole.This tadpole will become a frog and the process continues.'Differentiation' is when cells change into certain kinds of cells.These cells can be differentiated into blood cells,nerve cells,fat cells,and many other types of cells.As a mass of embryo cells split and differentiate,they create an animal.
A nucleus is the main part of a cell,where all of the information is stored.
An 'enucleated oocyte' is an oocyte without a nucleus.
'Nuclear transfer' is when the nucleus of of one cell is transferred into another cell,creating a 'new cell' with a different nucleus.
A 'quiescent' (qwee-S-cent) cell is a cell that has departed from the cell cycle and has stopped dividing.It may or may not re-enter the cell cycle at a later time,because it depends on the type of cell.
Diagram thanks to www.synapses.co.uk/science/clone.html
The 'cell cycle' is often depicted as 'a circle of life and division',but here it will be referred to as 'the cycle',meaning it repeats.
Got it?Good.
In 1975,a man by the name of Gurdon came up with the "nuclear transfer".This two step process uses fine needles and a powerful microscope to take the nucleus out of a frog oocyte (I guess frogs were the guinea pigs at this time),creating an enucleated oocyte.He discovered that the enucleated oocyte wouldn't divide or differentiate,even when fertilized,which isn't a surprise,as a cell can't do anything without the nucleus.
Gurdon's second step surprised many.He moved the nucleus from the frog cell into an enucleated oocyte.These nuclear transferred cells behaved a lot like a zygote.They divided and divided just as they were supposed to,until a great ball of cells was produced.Then this ball differentiated!The process continued on as a normal embryo,and the tadpoles were right on time.The tadpoles were clones,as they had come from the cells of the same adult and all had the same genetic make-up.Gurdon had proved that differentiation was reversible,because normal identical twins aren't made from differentiated cells.
Naturally,scientists got excited when they saw how Gurdon had cloned the tadpoles.Unfortunately,there were two problems,the first being that,no matter how hard scientists tried,nuclear transfer only worked on frogs.They tried it on mice,cattle,and many other mammals,but nothing happened.The 'new cells' would divide occasionally,but it didn't last and none of them properly differentiated.Secondly,Gurdon's nuclear transferred tadpoles never grew up!His experiment was repeated,but always with the same outcome.Even today,scientists can't explain why the tadpoles made by nuclear transfer never lived to become adults.By the 1980's most scientists accepted the fact that frogs have something special in them that allows them to be cloned.Whatever this ingredient is,it's not found in mammals.Therefore,differentiation is somewhat reversible in frogs (as they always stay tadpoles) but not in mammals.
It seemed as though cloning animals had come to a halt.There weren't many options left,but Roslin Institute scientist Keith Campbell had the idea that the cloning trouble may have had to do with the cell cycle.
A cell divides into two more cells,referred to as 'daughter cells',and both of these cells grow regularly,copy their hereditary material and again split,making two more daughter cells and repeating the process.The daughter cells are clones of each other,because both nuclei (plural of nucleus) have the same genes in them.This natural process goes on and on with each cycle.
The cell cycle intrigues biologists."Very fast cells occur during development causing a single cell to make many copies of itself as it grows and differentiates into an embryo." (Dr.Jamie Love,Issue 1-Science Explained).Hair,gut,and skin cells are fast cycling cells so that cells that have naturally died can quickly be replaced.This is why your hair grows so fast or why that cut on your arm is healed within the week.Skin cells divide to make more skin cells to replace the ones that died.Cancer is caused by cell cycles that are out of control.
Many biologists thought that,in order to clone something,the nucleus from a fast dividing cell should be transferred.This was quite logical because quickly cycling cells are just what makes an embryo grow.Thinking back,the gut cells used to clone the tadpoles were fast cycling.Many scientists tried this theory,but all attempts failed.
Dr.Keith Campbell tried a different route.He thought that a quiescent nucleus would be a better candidate.Although it wasn't cycling (which is what makes it quiescent),Dr.Campbell figured that was what the nucleus needed for it to be properly transferred.Perhaps the cell needed a 'rest' before beginning to create a whole new animal.Maybe the nucleus needed some time to get its DNA in order.So maybe quiescent cells would work!
They used cells from an adult sheep's mammary glands for the 'donor' nucleus.The cells were grown in 'tissue culture',"An artificial situation that is commonly used in laboratories to grow large numbers of cells in bottles." (Dr.Jamie Love,Issue 1-Science Explained).Tissue culture allows scientists to tinker with the cells and change their characteristics.This is precisely what Dr.Campbell did.He 'starved' them of vital nutrients and the cells ceased to grow and divide.They became quiescent.Soon Dolly would be created.
Using methods like ones used 20 years before by Gurdon,technician Bill Ritchie (who worked with Dr.Campbell) took the nucleus from an oocyte that was accumulated from a Scottish Blackface female sheep (the Scottish Blackface is a breed of sheep common in Scotland and recognizable by its black face).
Oocytes have a 'coat' of fibres and proteins (known as the zona pellucida) and it is through this guarded cover that that Mr.Ritchie injected the nucleus from the quiescent mammary cell into the enucleated oocyte.The nucleus was from a separate kind of sheep called the Fin Dorset.He then used a very minute pulse of electricity to make the nucleus fuse with the cytoplasm of the enucleated oocyte.This pulse also helped to start the cells into 'activity' so that they will more likely split or divide.This new cell was put into the reproductive track of a Blackface ewe (this was the same breed that gave the oocyte).
Diagram thanks to www.synapses.co.uk/science/clone.html
Scientists at the Roslin Institute repeated this operation 276 times!This was definitely no easy task.
After a normal length of time for a Fin Dorset,148 days,Dolly was born.
Dolly is a normal,healthy looking Fin Dorset and is a true clone,because Dolly's Blackfaced mother couldn't have given birth to a white faced sheep no matter who the father was.But the scientists double checked anyway,and 'fingerprinted' dolly and her mom and were able to prove that Dolly's DNA matched that of the cells from the tissue culture,and not the cells of her birth mother.Although some newspapers have said so,Dolly has not eaten her owner or any fellow sheep.She doesn't shoot laser beams from her eyes or talk.
The process failed 276 times.The 'new cells' (enucleated oocytes with donor nucleuses) were inserted into many ewes.The scientists checked their process after a few days and only recovered 247 cells.Some may have been lost because they are so hard to find.Others died early and decomposed.When examined under a microscope,88% of the 'new cells' that had been transferred had not developed.The researchers put the 29 remaining embryos into 13 ewes.Some ewes got only one embryo,some two,and some three.If the embryo and the ewe are not in synch,then the embryo won't become implanted in the ewe's womb.This is difficult to do and Roslin researchers said in their paper "Not all recipients were perfectly synchronized".This may be why only one of the 13 ewes became pregnant.Obviously,this was the one to give birth to Dolly.
But now,after only five years in this world,Dolly has run into a problem.What's happened?Go to the Dolly Dilemma page to find out how it happened.
(2013•溧水县三模)由克隆羊多利的培育过程分析,可得出的下列结论,不正确的是(  )
(2013•溧水县三模)由克隆羊多利的培育过程分析,可得出的下列结论,不正确的是(  )
A.遗传物质主要在细胞核中
B.多利羊的生殖方式属于无性生殖
C.细胞核具有全能性
D.多利羊的性状受三只母羊的DNA共同控制
zetOr_19821年前1
又胖又懒的猫 共回答了13个问题 | 采纳率100%
解题思路:克隆技术属于现代生物技术.在克隆羊多莉的培育过程中,科学家先将甲羊卵细胞的细胞核抽出,再将乙羊乳腺细胞的细胞核取出,将该细胞核注入来自甲羊的无核卵细胞中.这个融合成的卵细胞经过分裂形成胚胎,将这个胚胎移入丙羊的子宫内继续发育.发育成熟后小羊多利出生.因为细胞核内含有遗传物质,能够传递遗传信息,所以,培育出的小羊多莉和提供细胞核的母羊乙一模一样.

A、染色体只存在于细胞核中,因此克隆动物细胞中的染色体全部来自供体核,A正确;
B、克隆多利羊的过程没有生殖细胞的结合,属于无性生殖,B正确;
C、克隆羊“多莉”的产生过程说明动物细胞的细胞核具有全能性,C正确.
D、培育出的小羊多莉和提供细胞核的母羊一模一样,说明多利羊的性状受供核母羊的DNA控制.D错误.
故选:D.

点评:
本题考点: 克隆技术的应用.

考点点评: 关键掌握克隆的过程.

克隆羊多利的成功,在技术上突破之处为什么不是细胞核移植技术,而是供核细胞是体细胞
ccringet1年前1
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体细胞属于高度分化细胞,而多利羊的成功则证明了高度分化的动物细胞核具有一定的全能性,这个才是多利真正的成功之处.至于核移植,只要把一个细胞的细胞核拿掉后,在植入新的细胞核,细胞不死便可说核移植成功,这在多利成功前就有成功案例了
克隆羊多利是谁克隆的
lingpei1年前3
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1996年7月5日,英国科学家伊恩·维尔穆特博士用一个成年羊的体细胞成功的克隆出了一只小羊.这只小羊与它的“父亲”一模一样.动物的繁衍一般都要经过有性繁殖过程,要使它们能够无性繁殖,必须经过复杂的操作程序
克隆羊多利的诞生证明动物细胞具有全能性
图大力1年前3
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不对,证明是动物细胞核具有全能性.克隆羊多利的过程是取甲羊的乳腺细胞的核,把它移植到乙羊的去核卵细胞中,培养后移植到丙羊体内,产下就是多利,遗传性状像甲羊,所以可看出证明的是动物细胞核具有全能性.植物细胞具有全能性,胡萝卜的实验就是证明.
选择 一道克隆羊多利的诞生与三只羊有关,他与那只长的最像( )A、提供卵细胞的母羊 B、提供乳腺细胞的母羊C、代孕母羊
选择 一道
克隆羊多利的诞生与三只羊有关,他与那只长的最像( )
A、提供卵细胞的母羊 B、提供乳腺细胞的母羊
C、代孕母羊 D、三只羊都不像
不是说在细胞核中有遗传因素吗?
qjma1年前12
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克隆羊多利的诞生与三只羊有关,他与那只长的最像(A )
A、提供卵细胞的母羊 B、提供乳腺细胞的母羊
C、代孕母羊 D、三只羊都不像
克隆羊多利的诞生标志着什么生物科学领域的重大进展? [ ] A.基因工程
克隆羊多利的诞生标志着什么生物科学领域的重大进展?
[ ]
A.基因工程
B.细胞工程
C.育种工程
D.农业工程
伤心过了1年前1
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B
奇妙的克隆 克隆羊多利的生殖过程
庄周晓梦841年前1
halong-009 共回答了13个问题 | 采纳率84.6%
在培育多莉的过程中,科学家采用体细胞克隆技术,主要分四个步骤进行:  ①从一只六岁雌性的芬兰多塞特(Finn Dorset)白面绵羊(称之为A)的乳腺中取出乳腺细胞,将其放入低浓度的培养液中,细胞逐渐停止分裂,此细胞称之为供体细胞.  ②从一头苏格兰黑面母绵羊(称之为B)的卵巢中取出未受精的卵细胞,并立即将细胞核除去,留下一个无核的卵细胞,此细胞称之为受体细胞.  ③利用电脉冲方法,使供体细胞和受体细胞融合,最后形成融合细胞.电脉冲可以产生类似于自然受精过程中的一系列反应,使融合细胞也能像受精卵一样进行细胞分裂、分化,从而形成胚胎细胞.  ④将胚胎细胞转移到另一只苏格兰黑面母绵羊(称之为C)的子宫内,胚胎细胞进一步分化和发育,最后形成小绵羊多莉.