The Discovery Of Genetics And Inheritance Essay

Discoveries in DNA, cell biology, evolution, biotechnology have been among the major achievements in biology over the past 200 years with accelerated discoveries and insights over the last 50 years. Consider the progress we have made in these areas of human knowledge. Present at least three of the discoveries you find to be most important and describe their significance to society, health, and the culture of modern life.

Epigenetics is the future of science. It has evolved from being a science that very few believed in, to one that will shape medicine as it is known. As the Human Genome Project began, the goal was to determine which genes controlled what phenotypes in a human. After all the genes were identified and mapped, the expression of the genes that the scientists had just discovered was also beginning to be analyzed (EPIGENETICS). Although every gene had been identified and associated with a function, there were genes that if not expressed or not turned on, would create a different scenario. That is, the idea that the genotype of an individual would determine their phenotype was reinforced. Epigenetics however is the study of the switching on or off of the genes responsible for a particular action (Feinberg). For example, all of the organs of a single person have the exact same DNA as the others, yet a lung looks drastically different from a kidney. This is due to the expression of the genes responsible for creating a specific organ. If scientists are able to control the switching on and off of these genes, then many extraordinary possibilities exist.

Burying the dogma of the genomics fixity, epigenetics demonstrates that our lifestyle changes our genes and we pass these mutations on. This discovery opens up new prospects of cure for many diseases. At the level of our genome, there are two kinds of genes: exons which are genes that are expressed and induce the production of certain proteins, and introns which are genes that are eliminated in the transcription of the RNA, and which therefore are not expressed. Environmental conditions could change that by opening introns or closing exons with all possible intermediate situations between these two extremes, from this perspective, epigenetics would correspond to an open or closed switch, to varying degrees. These different positions of switches then open the door to many combinations of genes. This seems to go against a current scientific dogma that considers the genome of a person is inherited from the parents and then remains fixed and determined for his entire life. Moreover, according to the evolutionary theory of Darwin, if mutations occur in a species facing a changing environment, these changes occur only over extremely long periods of time that often number in the thousands or even millions years. Epigenetics shows that on the contrary, these changes are a natural way and very common in nature. With Epigenetics: we can change our

Genetics is a field of science that has long been studied, but researchers and scientists have discovered a new branch that changes the way genetics and evolution has been looked at before. Deepak Chopra and Rudolph E. Tanzi skillfully describe this new subject in their book Super Genes. The book includes information on the history and discoveries of epigenetics, the changes the readers can make to unlock and harness the power of their genes, and the research and experiments that prove the benefits of those changes. Ultimately, the purpose of Super Genes is to inform the readers that they can control their own genes, despite preceding understandings of biological destinies, by making favorable lifestyle choices that leans towards the state of optimum health and well being.

The genome is the complete set of an individual’s inheritable traits or it’s DNA. As a fetus develops, signals are received that cause incremental change in the gene expression patterns. The DNA in our bodies is wrapped around proteins called histone. The histone and DNA are covered in chemical tags. This structure is called an epigenome. The epigenome shapes the structure of the genome. Epigenetic marks are modifications of DNA and histones. The epigenome tightly wraps inactive genes and allows active genes to be more easily accessible. The epigenome adjusts specific genes in response to our changing environment. The programming of neurons through epigenetic mechanisms is critical in neural development. A type of cellular memory is formed when those changes occur. These are epigenetic tags. Each tag records the cell’s experiences on the DNA. This is to help stabilize gene expression. Over time, and with thousands of different experiences, an epigenetic profile forms for each cell type. Each one is unique, with a distinct identity and a specialized function. A flexible epigenome allows us to adjust and learn from our mistakes. The epigenome responds to signals. These signals come from a variety of places. From fetal development to old age, our epigenome is effected by our environmental factors.

The PBS video called “Epigenetics” brought to light some very interesting views. Through rats scientist have been able to see the works of epigenetics and believe that the finding have led to the idea that the change in genetics has the same effect on humans. The most interesting part of the video was that younger pairs of twins have very similar genes, but the older pairs of twin have more epigenetic difference in their genes. This validates the idea that the epigenetic difference in old twins is caused by environmental factors such as lifestyle choices. The idea also alludes to the idea that our parents and grandparents healthy and epigenetics may affect my heath and my children’s health. This leads to the inclination that my child’s health

Do the experiences or events that your parents, grandparents or even great grandparents had in the past affect your genes? Why do some humans have mental health issues and others do not? Behavioral epigenetics examines how nurture shapes nature, where nature refers to biological heredity and nurture refers to everything that occurs during the animal 's lifespan. Epigenetics is the study of alterations in an organism caused by modifications of gene expressions instead of alterations of the genetic code itself. Behavioral epigenetics is the field of study, which analyzes the role epigenetics have in shaping human or animal behavior. Epigenetics works by wrapping DNA around histone octamers to form nucleosomes. Genes will be transcribed or silenced depending on the spacing of nucleosomes, which is determined by complex processes, including post-translational modification of DNA and histones as well as the large numbers of chromatin regulatory proteins recruited to interact with these modifications (Nestler). Behavioral epigenetics explains why humans and animals behave the way they do, not by changing the DNA, but by modification of gene expression rather than alteration of the genetic code, which in turn changes behavior in multiple generations.

Epigenetics is a field where advances are being made daily. Epigenetics is defined as “heritable changes in gene expression that occur without a change in DNA sequence,” as stated by Dr. Alan Wolffe. A way in which we can understand this definition is by taking the analogy of a card game. The cards, the DNA sequence, have been dealt and will not change, however we need to understand how to play the cards, the rules, which is epigenetics. The guidelines can vary and completely change the way the card game is played and who comes out on top. The rules that are studied and understood through this research paper are those of DNA methylation and chromatin. These changes can produce

According to neuroscientist epigenetics is a new branch of genetics which addresses the effects of particular proteins affecting gene expression. It is the study of heritable changes in gene activity that are not caused by changes even if their DNA sequence code is the same, the way it functions can differ. Humans have 25,000 genes each one with their own function. Geneticists are studying a previously unknown aspect known as the epigenome: a series of chemicals that act like switches, which activate or deactivate individual genes. One of these switches (epi-markers) works by a process called DNA methylation, enzymes inside a cell attach a methyl group to a gene, this compound can deactivate or deactivate the gene, but the gene remains.

What is epigenetics? Epigenetics to me is the alteration to our genome that we are able to change in not only ourselves but in our children and future generations as well all based on lifestyle habits we live today. After first watching the PBS video on epigenetics, I was astonished on how our ways of life have such a profound effect upon not only our genes but our future generations of children as well. In the video research was conducted on over forty identical twins ages ranging from three to seventy-four, this was to compare the lifestyle habits such as smoking, exercise, and different diets have on an individual. I found it fascinating that when there was comparing the genomes of the elderly Spanish twins compared to the three-year-olds; we were able to see how much of a difference the Spanish twins genome

For years, scientists believed DNA, deoxyribonucleic acid, was the end-all-be-all: a mould for our cells to be created from. Which does not sound far-fetched since DNA contains all of the information needed for replication, differentiation, growth, and development, in addition to the countless cellular fates, as described in Waddington’s landscape. Instead, DNA is a guide for our cells, and Epigenetics is the tool that coerces them into their final cellular form. The Epigenetics Revolution: How Modern Biology Is Rewriting Our Understanding of Genetics, Disease, and Inheritance written by Nessa Carey, outlines the process of DNA versus Epigenetics, and the developments they have had within the scientific field. This paper will examine the fundamental distinction constructed by Nessa Carey between DNA as a script versus a template. This analogy of DNA as a script.

It is often thought that our DNA is a concert blue print and the way we personally engage with the environment has no effect on our future generation. However through experiments and recent studies, scientists have discovered external environmental factors can effect ones DNA sequence. It was found that genes have the ability to switch on and off and affect how cells read genes. This new avenue is called Epigenetics. Epigenetics is the study of heritable changes in gene expression. It describes the outward phenotypic appearance that is not the result to changes in the DNA sequence but instead, changes to the chemical tags that overlay the genome. Epigenetics is often described as the missing link between the environment an individual is exposed

The development and importance of epigenetics has revealed to the world the explanation of many gene expressing mutations also factors that may account for genetic variation. The result of this observation helped many scientists around the world cures as well as new analysis methods to help survivors .The understanding obtained from the discovery of epigenetics has and will continue to inform ways of preventing and manipulating genetic expressions to our advantage throughout these upcoming generations. Throughout this essay response, the following information will cover the focus on how epigenetics can account for genetic variability in organisms, it will also relate to factors

Epigenetics shows the way that the gene is used when it is passed on, instead of looking at the way a specific DNA sequence is passed on from generations. Epigenetics is based upon adding or removing small tags of chemical to DNA (British Society for Cell Biology ). The tags are essentially highlighting specific genes with certain information that determines whether they are turned on or off, the chemical tag is know as methyl group containing the letters A, G, C, T that represent the gene makeup in DNA. The arrangement of methyl groups can either change over the course of a lifetime, or affect and individual permanently during embryo development, this is determined by a number of factors that could disrupt the distribution of the groups (British Society for Cell Biology). As we all know, every individual inherits one copy of the gene pair from their mother, and second from their father. However, in the case of genomic imprinting it is different, because while the individual still receives one copy from their parent the other copy is silenced. In humans and mice, there are about 80 imprinted genes which relate to growth and the placenta (British Society for Cell Biology). In most cases, epigenetics is not passed down from generation to generation, and when it rarely does, it only lasts a

Epigenetics can be hereditable or environmental factors that affect the expression of genes and lead to changes in gene expression. Unlike genetics, epigenetics does not only have to do with which genes are passed down to the offspring and the DNA sequence. The environmental conditions of the offspring’s parents impact the genes in their eggs and sperms by “switching on” certain genes and “switching of” others (Dowshen). Since the genes expression of the gametes are affect, the phenotypes of the offspring will change. Even in a person’s lifetime, environmental factors such as stress, chemical exposure, and diet can continue to impact gene expression through DNA methylation. During DNA methylation, a methyl group is randomly added to a 5-carbon cytosine ring, making 5-methylcytosine and these groups inhibit transcription. (Cheriyedath). Due the fact that transcription is not possible, the expressing of the genes in that section of the DNA strand will be suppressed. The attachment of the methyl group to DNA is not determined, which means that