How cloning works in human ar other mammals? and cloning is sexual or asexual reproduction?
108459
An egg, and a sperm both contain a nucleus which holds half of our DNA (23 chromosomes). All of our other cells contain 46 Chromosomes. In the lab, they harvest an egg from which ever species they are cloning, and they remove the nucleus. They can then take the nucleus of a normal 46 chromosome cell and put it inside the egg- where it's nucleus used to be. The egg then "thinks" it is fertilized and will start to divide, and grow. This embryo is an exact replica of the parent cell. Cloning is a form of asexual reproduction, because sex was not involved in the creation of the new embryo. There are many ethical issues surrounding cloning. Some argue that scientists are "playing God" because they are creating new life. Some say that if a human were to be cloned- it would have no soul because it was not created by God. There are too many ethical issues to type here, but you get the idea. You'll have to decide for yourself where you stand. Hope this helps. good luck in school
902333
It is entirely possible, however we are more than just the product of our genetic code, the clone would be a completely different individual. But although it possible, it is illegal to experiment with cloning of human beings. However, it is a matter of time before someone breaks that law if they have not done so already. Then again maybe they have done it in a country like China that in most instances would ignore international law.
735244
Asexual reproduction is cloning. A piece of a plant may root or sprout and grow into a new plant which is genetically identical with the parent.  \n\nSexual reproduction results in a new plant which contains genetic material from two parents, but which is not genetically identical with either one.   These new plants may be able to adapt more successfully to environmental changes than their parents could.\n     To live and multiply on land, plants needed to evolve new structures and methods for reproduction.  An important advance was the development of the flower, a structure which allowed widespread scattering of its pollen and yet provided a stable, nurturing environment in the ovary for developing seeds.  Pollen could be carried from flower to flower by insects, the wind, or, sometimes, birds.  \n\n     The seed was another important innovation, as significant for plants as the amniotic egg was for land animals.  Seeds would form when the chromosomes of the parents were united in the ovary.  A seed is a compact package made of a cell capable of growing into a plant, food to help the plant get started, and, in angiosperms, a seed coat that protected the seed from dehydration  and  damage in the environment.  Properly protected seeds could survive until conditions favored their development.  In the deserts today, some seeds may lie dormant for many years until the rains come and provide conditions in which the seeds may germinate and grow into plants.  Some seeds also are contained in, or attached to, structures which help the seeds to be carried to other places that may be suitable for them.
493684
Cloning has become a widely debated issue in the media since 1996, when a group of Scottish scientists led by Ian Wilmut cloned Dolly, a sheep that was the first clone of an adult mammal. The cloning process involves destroying the nucleus of an egg cell of the animal that will carry the clone and injecting a donor nucleus from the individual to be cloned into that egg cell. The resulting egg thus has a nucleus from the donor animal (which may be an endangered animal) and can develop into an animal that has the same genetic makeup as the donor, thus making the resulting offspring a clone.\n\nSince Dolly's appearance, a wide variety of uses for mammalian cloning have been proposed, including using cloned animals to produce superior livestock and to simplify the process of creating transgenic animals (genetically modified animals that can make human proteins in their milk, for example). Several groups have suggested cloning endangered or recently extinct species. A company called Advanced Cell Technology used a cow named Bessie to clone an Asian gaur, an endangered oxlike animal native to India and Burma (the cloned gaur died of an ordinary disease two days after his birth). Scientists also hope to move on to cloning extinct animals, perhaps starting with the cloning of the now-extinct bucardo mountain goat from Spain; scientists froze some tissue from the last living animal before the species became extinct.\n\nCloning endangered and extinct species has raised heated debate in the scientific community and beyond. On the one hand, many say it may offer us an opportunity to protect animals such as the giant panda from extinction so that our descendants will be able to see the beauty of these creatures. Some claim that cloning may help us bring back recently extinct species. Still others just want to have an opportunity to see a mammoth. (By the way, cloning mammoths from tissues frozen in Siberian permafrost is considered impossible with the current techniques because their DNA has become fragmented. In addition, scientists do not think that fossilized species such as dinosaurs can be cloned.) Indeed, if successful cloning of an endangered or recently extinct species is possible, we may be able to boost the populations of these animals.\n\nOn the other hand, cloned populations consist of genetically identical individuals, leading to high susceptibility to many diseases and slow adaptation to the environment. In addition, some argue that introducing extinct species back into the wild may upset the natural balance and have disastrous effects on the populations of other species. Such concerns are probably not as relevant with recently extinct species, where their extinction has usually been caused by human interventions, such as destruction of habitats and hunting. We do have to consider such issues when we start talking about bringing back mammoths, but the cloning of long-extinct species is still only a theoretical possibility. Concerns remain, however, that endangered and recently extinct species could be brought back to a world where their habitats no longer exist, and they will only be able to survive in zoos.\n\nAnother concern voiced by animal conservationists is that cloning endangered species would be viewed by the public (and governments) as an alternative to the breeding and habitat-protection programs already in place. Such possibilities are especially alarming as cloning techniques become cheaper and may be viewed as a less costly alternative to the more traditional means of protecting endangered species. Of course, cloning cannot serve as a substitute for such programs, because cloned animals lack the genetic diversity that is crucial to survival, and they still need habitats to live in.\n\nAs you can see, cloning is far from being able to serve as a Noah's Ark that would save all endangered species from extinction, but together with habitat protection and breeding programs, it may help some endangered and rece
158195
Yeast can reproduce both sexually and asexually.  It can bud off to creat offspring genetically identical to the parent.  However, when resources are scarce, yeast cells can form ascospores and sexually reproduce.  Sexual reproduction may create offspring more suitable to the environment and better able to utilize scarce resources, so it is utilized in times of hardship.\n\nHope this helps, please don't forget to come back and mark a best answer!\n\nMore information can be found here:\nhttp://en.wikipedia.org/wiki/Yeast
718252
First, clones have been around for a long time - they can occur naturally. Identical twins or triplets start off with the same DNA and are considered clones of each other. There are many species of animal, including humans, where twinning naturally occurs.\n\nSome species, of both plant and animal, have been bred for so long to contain the same genetic material (useful for genetic studies) that each generation has the exact same DNA as its parents. While regular reproduction occurs, since the source material is the same, there ends up being no genetic variation, except for mutation.\n\nAs for artificial cloning, that has been developed in the past two decades. In 1997, Scottish researched announced that they had successfully taken genetic material from an adult ewe (female sheep) and inserted it into an egg cell that was implanted into another sheep who gave birth to the clone (Dolly the sheep), in a process called 'somatic cell nuclear transfer'. Since Dolly, several other mammals have been cloned. Because the transfered adult nuclei don't always take well with the hosting egg cells, there are many egg cells that don't develop clones than there are successful cloning attempts.
1044269
Well, technically identical twins are clones and many organisms with asexual reproduction clone themselves, so yes. I think the question should be if an artificial clone can reproduce; but most of them don't even live more than a few days.
84585
Just what it sounds like: producing lots of genetically identical plants.\n\nUnlike animal cloning plant cloning is a natural proccess that plants used for millions of years before humans evolved. Many plants can reproduce identical copies of themsleves from their roots, or by dropped limbs or from other parts of their bodies.\n\nHumans have used plant cloning for as long as we have been farming. Common cloning techniques include the use of cuttings, runners, grafts, splitting of bulbs and the planting of tubers and bulbs.
687236
A clone is a group of identical genes, cells, or organisms derived from a single ancestor. For example a living thing.\n\nA copy refers to a reproduction of a photo, copy, or other pieces of work.
855495
very simple\n\nBecause sexual reproduction involves 2 species(man and woman) which entails 2 different genetic make-up. Therefore,\nthe offspring that will be produced will be based from the resulting gene of the mother and the father\n\nwhile asexual reproduction do not involve a 2nd party and so naturally it will produce another organism which is identical since it is organically within its genetic make-up
94476
asexual reporduction is when the organism simply makes a clone of itself. Sexual reproduction is when there is a joining of sperm and eggs (this can include hermaphrodites because though it is one organism, they have the joining of sperm and egg internally). Both of them have evolutionary value. I think this is a high school question, so your teacher is probably asking which is better at adapting to changing conditions. It is Sexual reporduction because it allows a greater diversity and therefore the species can survive a wider array of conditions. But the sexual reproduction takes a lot of investment to the organism.
515151
No, the sperm contains only half of the genetic information that is needed to make a baby, so when the sperm (50%) and the ovum (50%) merge, you get all the genetic information needed to make a baby. Cloning means when the baby's information is not taken from the sperm+ovum, but from another cell in the body (which has 100% of genetic info, like all cells in the body, except the sperm and the ovum). \nBut a human baby has not yet been cloned, only sheep and other animals - it is dangerous to clone because a process called recombination does not occur - that's like mixing. When the sperm and ovum gets together, the DNA gets "mixed" and often the "best" DNA gets selected to give you strong and healthy babies. From a single body cell, the DNA cannot get "mixed" and have to be used the way it is, so the sheep born from this process, for instance, ended up getting all kinds of weird diseases. \n\nPS: the more info part of your question does not make any sense
151379
Is this what cloning basically is? Asexual reproduction? And are we headed toward making a "perfect" species?  \n*** does this mean humans will become extinct in the not too distant future?
887897
For normally conceived animals, the biological age is the same as the chronological age. For clones, it is the chronological age of the clone plus the chronological age of the donor when the cell was extracted . If the donor animal was 5 years old when the cell was taken, then the clone's biological age will be its chronological age PLUS 5 years.\nhttp://www.messybeast.com/gene-jargon.htm\n\ncan be measured in terms of skeletal age, somatic (physique) maturity, or sexual maturation.\nhttp://www.gk22.com/resources/glossary.html
11918
This is probably the strangest question I have ever seen.  I suppose there are only two sexes because there is only one reason for there to be more than one sex:  reproduction.  Some organisms reproduce asexually, but their offspring are exact clones.  In order to create an entirely new organism, we need to have at two different sets of genes to combine.  Since we reproduce by sperm (male) and egg (female), how could there possibly be another sex capable of reproduction?
84942
Mostly fiction. When cloning technologies advance, humans eventualy will be able to be cloned, but not the way they show it on "the 6th say" - we won't be able to take a human body "template", "clone" it in the matter of minutes and install previous memories of the cloned individual. Normal scientific cloning, as we know it today, would generate a zygote, which would need to be implanted in a uterus and grow as a fetus. The newborn baby would have the same DNA as the cloned individual, so it would be an identical twin in a sense, but it will need to grow as a normal child to become an adult. The clone will have its own memories and probably a different personality, since it will be raised in a different environment than the DNA donor.
874287
It is where they take the genetic structure of one cow's DNA and making the exact same cow. Basically they take DNA from one cow and insert it into a cows embryo - then that cow gives birth to a cow with the same genetic structure as the one they took the DNA from. Creating a clone. \n\nGo to this website for a less confusing explanation :)\nwww.ornl.gov/sci/techresources/Human_Genome/elsi/cloning.shtml