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essays on the process of cloning
cloning in animals and human
cloning in animals and human
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Dolly and the New Age of Cloning
The concept of cloning is not new. Organisms ranging from microbes (for example bacteria) and animals (such as aphids and even certain species of shrimp and snails) have practiced asexual reproduction for millions of years, where the offspring are exact duplicates of the parents. It is also not uncommon to encounter identical twins among the more complex life forms like mammals. Twins are in essence clones as they share the same genetic blueprint. What then is so significant about Dolly?
In the research paper published by I. Wilmut, W.A. Ritchie, J. McWhir and K.H.S. Campbell (1), Dolly was described as the first known mammal to be cloned by nuclear transfer from a cultured cell line. This technique is revolutionary as it dispelled a dogma in biology that upholds the notion of differentiated cells, being highly specialized, are irreversibly altered to an extent that would render them unable to inter-convert between cell forms (i.e a lymphocyte is not able to produce a nerve cell and vice versa). Dolly is living proof that a differentiated cell, such as one in the udder of sheep, has not only the potential of creating other tissue forms, but the entire living being. The evidence gathered from Dolly also went one step further to establish that organisms produced in such a way were not disadvantaged in their general physiological or reproductive function.
Thus the new age of cloning was born with Dolly as its flagship. The success of Dr Ian Wilmut and his team in creating Dolly sparked global interest. This has greatly benefitted science as it has accelerated the rate at which knowledge is assimilated in the field of cloning. Many attempts have been to clone other mammals (for example cows or pigs). However they do not always yield fruitful results. Dolly can be considered to be a success among 277 failures. Indeed of the 277 oocytes used in the experiment, only one yielded a success. The techniques used in cloning would have to be refined before it can be universally applied. We have now uncovered other interesting facts about Dolly and cloning. For example, Dolly is considered to be "older" than her natural counterparts by a measure of the length of her telomeres that was found to be relatively shorter. However Advanced Cell Technology (ACT) of Worcester, Massachusetts, using different techniques than Dr Ian Wilmut and his team, produced calves that were found to have longer telomeres (2).
"A variety of terms are used to describe fear. The Bible uses words like fear, afraid, terror, dread, anxious, tremble, shake, and quake over 850 times to portray this core human emotion. Healthcare professionals use terms like fear, anxiety, panic attack, and phobia to illuminate the spectrum of our fears." (2)
Cloning is the creation of an organism that is an exact genetic copy of another. Every single bit of DNA is the same. There are three different types of cloning. Gene cloning produces copies of genes or fragments of DNA, reproductive cloning creates copies of whole animals, and therapeutic cloning builds embryonic stem cells for experiments aimed at creating tissues to replace injured or diseased tissues. In 1997 scientists in Scotland announced the birth of a clone. Its name was Dolly; after the American country singer. She was the clone of an adult female sheep, and the first mammal to ever be cloned successfully. As Dolly matured, she mated with a ram, and gave birth to a lamb showing that clones have the ability to reproduce. Dolly died at the age of six. According to Sheep 101, the life expectancy for a sheep is 10-12 years, but some sheep can live up to 20 years.
(AC 1.1, 2.1) Jane may be uncertain about the side effects of chemotherapy and radiotherapy. This is the time when the oncology nurse will use her specialist knowledge, will answer all questions that Jane is not sure and even if she does not know the answer she will find out by working with other team members. Based on the nurse’s oncology knowledge and experience her communication skills will make Jane and her family think positively about treatment; not only at the beginning of cancer treatment but also during and at the end however it turns out.
...ences attitudes and behaviors. There is almost an even split between studies that music has antisocial effects and studies that suggest that the effects are minor or nonexistent. Tatum suggests that extensive research must be conducted before casual inferences are made.
Cloning is a recent innovative technique the National Institute of Health defines as a process employed to produce genetically identical copies of a biological entity. Depending on the purpose for the clone, human health or even human life can be improved or designed respectively. “Somatic cell nuclear transfer (SCNT) is the most common cloning technique. SCNT involves putting the nucleus of a body cell into an egg from which the nucleus has been removed."^1 From this technique, an embryonic cell is activated to produce an animal that is genetically identical to the donor. Today, human cloning still remains as a vision, but because of the success of Dolly, the lamb, researchers are becoming more confident in the ability to produce a genuine
In the essay, Cloning Reality: Brave New World by Wesley J. Smith, a skewed view of the effects of cloning is presented. Wesley feels that cloning will end the perception of human life as sacred and ruin the great diversity that exists today. He feels that cloning may in fact, end human society as we know it, and create a horrible place where humans are simply a resource. I disagree with Wesley because I think that the positive effects of controlled human cloning can greatly improve the quality of life for humans today, and that these benefits far outweigh the potential drawbacks that could occur if cloning was misused.
Prevention Research Center, Pacific Institute for Research and Evaluation, Meng-Jinn Chen Ph.D, Brenda A. Miller Ph.D, Joel W. Grube Ph.D, & Elizabeth D. Waiters Ph.D (2006). Music, Substance Use, and Aggression. Journal of Studies on Alcohol, 67(3), 373-381 .
Spearmann thought of cloning as a way to study cell differentiation. Briggs and King used the technique of nuclear transfer on amphibians and it was successful (Campbell). “Subsequently John Gurdon demonstrated the potential to reprogram differentiated cells by producing adult Xenopus using epithelial cells from developing tadpole intestine as nuclear donors,” says Alberio Campbell. Unfortunately, later studies show that this method of cloning tadpoles didn’t allow them to develop to the adult stage of life (Campbell). “The use of enucleated metaphase II oocytes as recipient cytoplasts proved more successful and in 1986 resulted in the production of live lambs using blastomeres from 8 to 16-cell stage embryos as nuclear donors,” says Campbell. This success in sheep was also used on other mammals such as cattle and swine. There were limitations to the technology. First, the “frequency development was very low”...
The nurse in today's society provides different services to the healthcare community. Taylor (2011) lists the common roles of the nurse as follows: communicators, educators, researchers, advocates, collaborators, and caregivers. The communicator role of a nurse involves “effective interpersonal and therapeutic communication skills to establish and maintain helping relationships with patients of all ages in a wide variety of healthcare settings” (Taylor, 2011, pg 11). Patients look to nurses for information and communicate better with them because they are the most hands on role in the healthcare setting. As an educator, the nurse is responsible for assessing and evaluating individualized teaching plans for patients and their families (pg
Not so far in the future, a young boy of the age of six, dying a heart-wrenching death, will only be able survive with a bone marrow transplant. His parents will have searched near and far for a match, but none will come to their aid. The only possible way that they can produce a perfect match for their son's bone marrow is to clone their son. Unfortunately, at this time this topic is still being discussed and debated upon with the government. Their only child that has been their treasure for six years might die. A clone of their son becomes their apple of aspiration to keep the treasure from being buried.
In recent years our world has undergone many changes and advancements, cloning is a primary example of this new modernism. On July 5th, 1995, Dolly, the first cloned animal, was created. She was cloned from a six-year-old sheep, making her cells genetically six years old at her creation. However, scientists were amazed to see Dolly live for another six years, until she died early 2005 from a common lung disease found in sheep. This discovery sparked a curiosity for cloning all over the world, however, mankind must answer a question, should cloning be allowed? To answer this question some issues need to be explored. Is cloning morally correct, is it a reliable way to produce life, and should human experimentation be allowed?
The idea that music leads its listeners to participate in deviant acts can be left up to each individual’s opinion. The truth is, is that there is not sufficient research to prove or disprove whether music has a strong influence, if any, on the listener’s choices to engage in deviant behaviors. One thing for certain is that music can influence a population’s appearance and culture. Whether or not music causes listeners to be deviant, music will continue to be produced and played around the world.
been made possible but yet a majority of them have died in early stages of development or after birth according to the study of the cloned sheep, Dolly (Magalhães 1). Those who make it suffer from several defects acquired from birth (Magalhães 1). During recent experimentation it took scientist Ian Wilmut of the Roslin Institute in Edinburgh, Scotland, and his colleagues who created Dolly (a cloned sheep) 277 tries before they got a healthy, feasible lamb (Human Cloning 1). Due to the complication of human cloning even more deaths and deadly birth defects can be expected (Human Cloning 1). Even though human cloning has never been performed, one likely possibility is that babies born through this process will as well feature lethal birth defects (Magalhães 1).
1) Robertson, John A. “Human Cloning and the Challenge of Regulation,” The New England Journal of Medicine, vol. 339, no. 2 (July 9, 1998), pp. 119-122.
The Benefits of Human Cloning In recent years, many new breakthroughs in the areas of science and technology have been discovered. A lot of these discoveries have been beneficial to the scientific community and to the people of the world. One of the newest breakthroughs is the ability to clone. Ever since Ian Wilmut and his co-workers completed the successful cloning of an adult sheep named Dolly, there has been an ongoing debate on whether it is right or wrong to continue the research of cloning (Burley).