Wait a second!
More handpicked essays just for you.
More handpicked essays just for you.
Cloning dilemma
Don’t take our word for it - see why 10 million students trust us with their essay needs.
Recommended: Cloning dilemma
WORK INTRODUCTION Theoretically, mammoths could be cloned by recovering, reconstructing or synthesizing viable mammoth DNA and injecting it into the egg cell of a modern elephant whose nuclear DNA has been removed; alternatively, mammoth genetic material could be introduced into an elephant genome in order to create a mammoth-elephant hybrid or chimera. The possibility of bringing extinct animals back to life has fascinated people for years. While something like Jurassic Park is unlikely, Pleistocene Park just got one step closer to becoming a reality. One day, mammoths may walk the Earth again.
The first step is to begin to understand the creature humanity wants to return to the world. A woolly mammoth, also known as Mammuthus primigenius, is one of several types of mammoths that belong in the genus Mammuthus and within the order Proboscidea. The difference between a woolly mammoth and an elephant is that a woolly mammoth had a large shoulder hump, a sloping back, smaller ears, a small trunk with a distinctive tip and two finger-like projections, huge spirally curved tusks up to 3.5 meters long, and spiral locks of dark hair covering a silky under fur.
Mammoths can be classified on a number of variables such as: the height of the crown, the number of ridges on crown, and thickness of the enamel. There are generally two main varieties of mammoths in both Eurasia and North America; one type is smaller and generally inhabited the north, and the second southern type from both Eurasia and North America can be lumped together for simplification and referred to as the Columbian mammoth, or Mammuthus columbi.
The main question surrounding the scientific community is why should we take the time and resources to clone a mammoth? What wo...
... middle of paper ...
....
Even still, from the perspective of natural selection, it could be said that natural forces selected against mammals from the Pleistocene age since they could not adapt to changing ecological and climatic conditions. One can argue that bringing these animals back from extinction essentially contravenes the intent of nature and raises a number of complex philosophical questions that are still being debated today.
Despite all of this debate and controversy, it still says a lot about the human race that we can even discuss the possibility of, in a way, raising the dead. There has clearly been much discussion about whether synthetic biology could really create artificial life and bring back the most iconic mammal from the Pleistocene era. There are obviously many positives and negatives to cloning, but one cannot deny that it is now within humanity’s power to do so.
Not only are giraffes the tallest animals in the world, they are also one of the most recognizable. Their characteristic long necks quickly captivate any audience. That being said, it is not commonly known that there are thought to be nine subspecies of Giraffa camelopardalis. In fact, there is increasing evidence that these could potentially be separate species in their own right. This paper will discuss where giraffes fit in the Tree of Life and identify the giraffe’s closest relatives, differentiate and analyze the similarities and differences between the nine subspecies, and, finally, explore any debate revolving around the phylogeny of the subspecies.
Humans have driven many animals extinct, but should we bring them back is the question. Geneticists, biologists, conservationists and ethicists gathered to discuss the controversies. Some people say in doing this we are playing God, while others say we did by killing them. Other scientist say that it may be beneficial because it will add biodiversity, and medicinal properties back to the ecosystem. It is only possible to bring species back from around 10 thousand years ago. Recently scientists have vastly improved the cloning process. We can now coax adult animal cells into any type of cell, including eggs and sperm, then manipulating them into full-fledged embryos, which has led to the ideas and developments of reviving many other species including mammoths, frogs and
The relationship of the three species and their ancestors can be summarized by looking at the fossils above. It is evident that all of these three species possess fangs and other types of sharp, prominent teeth. These analogous features indicate that there is some similarity in ancestry, since they all form part of the same family group, although they come from different genus. However, there is some difference in the shape of the head. The coyote possesses a straighter jaw and more angular head. The wolf, on the other side, has a wider denture similar to the fox. These three species also share Homologous structures, such as fangs, are present in these species. Another homologous structure is the legs and ribs, since they all have a similar
The question of what caused the extinction of megafauna during the Late Pleistocene period is one that archaeologists have struggled to answer for decades, but why should it matter? Discovering with certainty the cause of megafaunal extinction would simultaneously prove or disprove any of the proposed implications of each existing theory regarding this massive extinction.
Today, we as a society world wide have a new issue to deal with. Science has discovered the means in which to clone animals, opening a whole new discussion. Many people are inclined to say why would science even wish to peruse this method of research. Lewis Thomas says in his essay "The Hazards of Science"
The Alaskan moose is the largest sub-specious of the deer family which is very closely related to the Elk in Europe. The adult bull weighing up to 760 kg and the females can weigh up to 360 kg. The moose can grow to seven and half feet high, the highest point being at its large shoulders. The shoulders support “the males bear racks of flattened antlers that sometimes have a spread of 6 feet or more” Their front legs are longer than their rear legs and their body is covered in thick fur which is shaded in many hues of brown. Their heads are long peninsular in shape which is completed with a large upper lip and nose. Under their neck lies a dewlap or dangling “bell “which is a flap of skin near the throat. They have short tails and small ears.
In this paper, "cloning" refers to a process begun when an enucleated oocyte receives a complete set of genetic material from one adult of the same species, and then develops. The resultant cloned embryo is genetically identical to the adult supplying the DNA. Thus, cloning differs from sexual reproduction, in which half the genetic material of the fertilized egg is supplied from the oocyte itself and half from the sperm. It is also different from "twinning," in which an egg, once fertilized sexually, splits into two genetically identical zygotes, each of which may develop into an embryo. In February 1997, Dr. Ian Wilmut announced the birth of Dolly, the cloned offspring of an ewe. If it is possible to clone sheep, why not then humans?
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”...
Modern-day genetic technology has granted mankind with the opportunity to bring back extinct species from the dead. If humans have come to possess the DNA from an extinct animal population, it is possible to create an identical clone of the animal in question, effectively “bringing it back from the dead”. Many ethical dilemmas surround the practice of de-extinction, and rightfully so. Recreating an extinct species could produce groundbreaking scientific breakthroughs, generating exciting opportunities for future genetics-based research. However, there could also be monumental consequences: the newly revived, once-extinct species might destroy the ecological equilibrium of modern Earth
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?
Throughout time, human and animal cloning has developed into a new important technology in everyday lives without always knowing it. Cloning is the process of copying or duplicating an organism. Human and animal cloning has so many different outcomes and uncertainties. It can be used for many different purposes, depending on what someone wants to use it for. People all around the world have different views on cloning. Some are against it and some are for it. However, not everyone fully understands how cloning works. Human and animal cloning will determine our future. It can improve or maybe even destroy mankind. Cloning is very important to the world because it can lead to new developments later on in the world that have not yet been thought of.
Humans have always loved to mix and combine things weather it is for looks, tastes, and stories. These combinations have always been seen as an improvement until recently. Medical breakthroughs in the cloning industry have been raising more ethical questions than when it initially started. The main issue was playing God. The new issue now is where we draw the line. As of 2003 the first human-animal embryo was created in China at the Shanghai Second Medical University. The creation was a human-rabbit embryo. However the embryo was destroyed before stem cells and research could be collected and studied.
Whales are notable for being mammals which are fully adapted to oceanic life. These are three groups of Whales in their phylogenetic tree; Archaeocetes, Mysticeti and Odontoceti. The first group are known from their fossils and are seen to be a transitionary form as they retained a number of features associated with land mammals e.g. hind limbs with feet and limbs. The two other groups diverged around the start of the Oligocene; when the ice caps started to grow in the poles of the earth. It has been suggested that this may be due to the rise of seasonal planktonic production which could have led to specialisation (Houben, 2013); this ties in nicely with other summarisations which link the diversions of Whales in this time period. Mysticeti and Odontoceti differ on two counts; Mysticeti possess baleen making them filter feeders of plankton, in comparison Odontoceti possess a single set of teeth and have the ability to echolocate.
Cloning has many promises but isn't all it's said to be. It has been the talk of the scientific world since the sheep they call Dolly was introduced to the world as the first mammal ever to be cloned. Excitement grew into the desire to create human life. Scientists promised organ regeneration, advanced cosmetics, and the chanc...
Australian researches have made major steps towards bringing frog that was extinct in 1983 back to life. Although the procedure of de-extinction is much more complex than cloning living animals. A group of scientists (Lazarus Project team) believe humans have the skill and obligation to repair the damage they have done to the world, which has caused numerous species to die out.