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Critically review evidence of genetic and environmental influences to intelligence
Critically review evidence of genetic and environmental influences to intelligence
The human genome biology chapter
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In the twenty three chromosomes that make up the human genome, there are over one billion three letter “words” of DNA which make us who we are. The book Genome by Matt Ridley explains each pair of chromosomes in the human body, and how it affects our lives. The story is divided into twenty three chapters, each representing a pair of chromosomes in the human body.
The story opens with an explanation of the terms used in the book and a comparison of how DNA and RNA and different.
In chapters two through four, it is explained how we have only 23 pairs of chromosomes, as chromosome 2 is actually a merge between two pairs of ape chromosomes. It then presents different points of view of Darwinism and Mendelism, and how diseases can be caused by
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The first topic Ridley covers is how our environment can cause our genes to develop differently. Using asthma as an example, he shows how people in the city, surrounded by chemicals and particles, are more likely to develop asthma. He then explains how intelligence is hereditary by citing experiments of twins who grew up in opposite environments, yet developed the same. He then moved onto human instinct and proved how we do in fact have instincts. He demonstrates this mostly by talking about an instinct in children which allows them to understand the syntax of grammar in multiple languages, without any outside influence.
The next chapter in the book isn’t numbered, however it refers to the X and Y chromosomes. Depending on which chromosome a child inherits from its father, will determine which gender it is. If it receives an X chromosome from the father, it will be a girl, however if it receives a Y chromosome, it will be a
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Since we’ve started to genetically engineer sheep, a brain disease called Scrapie has appeared. What makes this disease different though is that is can be both genetic and transmitted. This has caused governments take extreme measures, such as preventing people from eating meat from the animals. Next, in 1885 Francis Galton invented the word Eugenic to describe the selective breeding of only the most capable people in society. He thought that this would eventually eliminate imperfections with human beings. Finally, to conclude our summary of Genome, the topic of free will. Although we are created by genes, our outside environment shapes who we are and how we act, essentially giving us freedom to choose who we are. Now, lets take a glimpse at one of the many controversial topics included in the
Usage of genetic modification to pick and chose features and personality traits of embryos could conceivably occur in future times. Wealthy individuals could essentially purchase a baby with built-in genetic advantages (Simmons). Ethically, these seem immoral. Playing God and taking control over the natural way of life makes some understandably uneasy. Ultimately, religious and moral standpoints should play a role in the future of genetic engineering, but not control it. Genetic engineering’s advantages far outweigh the cost of a genetically formulated baby and
DNA is the genetic material found in cells of all living organisms. Human beings contain approximately one trillion cells (Aronson 9). DNA is a long strand in the shape of a double helix made up of small building blocks (Riley). The repeat segments are cut out of the DNA strand by a restrictive enzyme that acts like scissors and the resulting fragments are sorted out by electrophoresis (Saferstein 391).
The book Genome by Matt Ridley tells the story of the relationship between genome and life by examining the twenty three chromosomes of the human DNA. Each chromosome literally and metaphorically becomes a chapter in the literal and metaphorical book of DNA. In this book of DNA, Ridley examines a particular aspect of the chromosomes chapter by chapter to see how it affects life and humanity’s understanding of life, humans and genetics itself. Although each chapter dives into different aspects of DNA and gathers stories as varied as the genes’ applications, Ridley connects them with important ideas about life and humanity’s understanding of life.
Darwin: A Norton Critical Edition, Second Edition ; ed. by Philip Appleman; copyright 1979, 1970 by W.W. Norton & Company, Inc.
The ethics behind genetic engineering have been discussed and argued for years now. Some arguing points often include competitive advantages, playing God, and the polarization of society, but Sandel takes a different approach in explaining society’s “unease” with the morality of genetic engineering. Broadcasted through several examples throughout the book, Sandel explains that genetic engineering is immoral because it takes away what makes us human and makes us something else. He states that by taking control of our genetic makeup, or the makeup of our progeny, we lose our human dignity and humility. Our hunger for control will lead to the loss of appreciation for natural gifts, whether they are certain talents, inherited from the genetic lottery, or the gift of life itself.
Savulescu, Julian. “Genetic Interventions and the Ethics of Human Beings.” Readings in the Philosophy of Technology. Ed. David Kaplan. 2nd ed. Lanham: Roman & Littlefield, 2009. 417-430.
Darwin's General Summary and Conclusions of the Descent of Man and Selection in Relation to Sex In the "General Summary and Conclusions" of The Descent of Man, and
The eugenic decision-making that drives all aspects of life in Gattaca strays from the basic principles of determinism. While the advancement of genetic technology should allow for more power and freedoms to express an individuals own values and experiences like Kitcher and Stock imagine, in Gattaca social pressures drive eugenic decisions. The film illustrates actual possibilities of how human life and human societies may operate if responsible eugenics isn’t practiced. It is human nature to advance and adapt to our changing environments, improvements in technology are merely new means of doing so. But as humans we embody ethical values and morals that will always influence our decisions. As a culture influenced by our inherent biology, who is to say that our culture will not remold our biology?
Presently, computers are being used to hold the vast databases of all the sequencing information for every gene of the human DNA strand. If computers were not available, the paper needed to contain all this information would stack higher than the Washington Monument, over 555 feet high. And this would only be for the data, not the analysis of that data. Imagine the nightmare of trying to find the correct gene pair, there are over 3.2 billion of them, in all that paper. But providing a database for the sequencing information of the human genome is only one way in which computers are helping in the mapping of the human genome. They also provide the computational power needed to speed the calculations for each gene as well as producing maps and the such for genetic information on each chromosome (Smith 14). In fact, Compaq Computer Corporation built specific technology enabling completion of the Human Genome.
The first chapter starts off with the basic structure of DNA and describes how the base pairing of each nucleotide creates each amino acid, which when all put together create a strand of DNA. It also gives an idea of who is working on the project. She lists several major cities where the project is being worked on and then goes on to explain how between all these different teams, who are all working on some different aspect of the project, there are also anywhere from 200 to 400 other smaller teams all around the country working on it. The next chapter is about chromosome 18, and how a slight mistake in it can cause things like mental retardation and deafness, and what they are trying to do to help stop or fix chromosome 18 deletion syndrome.
To begin with, gender must be examined at the basic level of science in regard to physical and biological development of humans. We all understand the physical differences between the male and female gender, but how is our sex actually determined. After conception,
Genes are, basically, the blueprints of our body which are passed down from generation to generation. Through the exploration of these inherited materials, scientists have ventured into the recent, and rather controversial, field of genetic engineering. It is described as the "artificial modification of the genetic code of a living organism", and involves the "manipulation and alteration of inborn characteristics" by humans (Lanza). Like many other issues, genetic engineering has sparked a heated debate. Some people believe that it has the potential to become the new "miracle tool" of medicine. To others, this new technology borders on the realm of immorality, and is an omen of the danger to come, and are firmly convinced that this human intervention into nature is unethical, and will bring about the destruction of mankind (Lanza).
Each chromosome has a characteristic set of genes, which code for different features. The human Genome project is investigating which genes are located on which chromosomes. The gene for cystic fibrosis is located on chromosome 7.
In their research article, “Genetic modification and genetic determinism”, David B. Resnik and Daniel B. Vorhaus argue that all the nonconsequentialist arguments against genetic modification are faulty because of the assumption that all the traits are strongly genetically determined, which is not the case. Resnik and Vorhaus dispel four arguments against genetic modification one-by-one. The freedom argument represents three claims: genetic modification prevents the person who has been modified from making free choices related to the modified trait, limits the range of behaviors and life plans, and interferes with the person 's ability to make free choices by increasing parental expectations and demands (Resnik & Vorhaus 5). The authors find this argument not convincing, as genes are simply not “powerful” enough to deprive a person of free choice, career and life options. In addition to that, they argue that parental control depends not on genetic procedure itself, but rather on parents’ basic knowledge of what the results of the modification should be. In a similar fashion, the giftedness arguments, which states that “Children are no longer viewed as gifts, but as