How Dna Is Influenced By The External Environment

If we look at epigenetics it tells us how nature vs nurture interacts cohesively. In chapter three of Discovering Psychology, the Science of The Mind it states that “Epigenetics refers to the field of reversible development of traits by facts that determines how the genes perform.” (John T. Cacioppo and Laura A. Freberg, 2014 p. 73). With that being said, we know that our genes play a role

Heredity also plays a role in the development of cancer. If a person’s relatives have a history of cancer, then that person has a higher risk of developing cancer. Genetic variations, particularly those influencing how the body responds to carcinogens, may create a greater vulnerability to cancer.

Depression is caused by a combination of genetic, biological, environmental, and psychological factors (“Depression: Causes, Symptoms and Treatments” 2015). Researchers are becoming increasingly aware that depression runs in families (Kam,2009) meaning that certain genes may make people prone to depression suggesting a biological vulnerability. The biological factors that have some effect on the hereditary and biological influences of depression are the genes, hormones, and brain chemicals.

The hereditary influences that affect our human development come from predisposed genetically transmitted roots. These factors such as a person 's weight, appearance, height, and muscular composition are not influenced by any external sources. These genetic factors can play a part in how a person feels about them self during their life.

There is also strong evidence that depression is caused by drugs or alcohol abuse which ultimately changes some genetics of the person

However, apart from genetic component we must not overlook other factors such as viruses, toxic or environmental agents, metals, electromagnetic fields,

DNA plays a role in in heritance by our genetic make-up. Genetics make us who we are. This means our eye color, hair color, and even our intelligence. 80% of genetics comes from our mother and father. That means that if your mother or father were different, you would be a completely different person (National Library of Medicine (U.S.), 2017, p.5-13).

The DNA Mystique looks into the power of the gene in today’s society. Dorothy Nelkin and Susan Lindee (1995) describe the evolution of the gene as a cultural icon. Society puts a huge emphasis on understanding everyday behavior and the “secret of life” through genetic essentialism. According to Nelkin and Lindee genetic essentialism “reduces the self to a molecular entity, equating human beings, in all their social, historical, and moral complexity, with their genes” (p. 337). DNA is used as a way to define the individual’s true self and understand the evolution of a person’s identity. Nelkin and Lindee discuss the intersection of science and popular culture to shape the cultural meaning of the gene (p. 338). They lay out a timeline of genetic mapping and the use of genome research to determine future outcomes.

A roadmap to our future is predetermined by our genetical makeup. However, can external influences such as environment and lifestyle unlock who we are? The study to understand heritable changes in genetical expression is called Epigenetics. Héctor González-Pardo and Marino Pérez Álvarez(2013) describes Epigenetics as the examination of the heritable complex genetical alterations that are shaped by environmental factors which don’t cause changes to the DNA Sequence. In other words, different cell/organism must use the same script in different ways. The study of epigenetics explores the idea that DNA is a script and not a manual. Accordingly, we can positively influence our lives as well as the lives of our offspring by leading a healthy lifestyle.

causes that go beyond genetics. In fact, as Moore quoted in his book, the Centers for Disease

The idea that our genetic code controls most aspects of our lives is arguable. Nowadays, scientists (cell biologists, neuroscientists, etc.) are uncovering concrete evidence that are genetic code is only one of the many complex system of the human body that sways our lives. According to one new study, (“Do

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

Genes and the environment influence behaviour, as there is constantly an interaction between the two. Genes, via their influences on morphology and physiology, create a framework within which the environment acts to shape the behaviour of an individual. The environment can affect morphological and physiological development; therefore behaviour develops as a result of ones interactions with the environment. Genes create the scaffold for

Two influences make you what you are at this moment: heredity and environment. Heredity is the set of characteristics that you inherited from parents. Environment is the set of factors that have acted on you throughout your life. Sometimes it is difficult to determine where the influences of heredity end and environmental influences begin. Genetics is the study of heredity and attempts to provide some answers to this question.

Over the years, people have argued and discussed about what could be possible causes of depression. Some experts believe that a person’s genes could be a determinative of whether he or she is inclined or genetically predisposed, to depression. Experts point it to the fact that depressive genes could run in families. Other specialists lessen the role of the person’s genetic, arguing that depression is generally caused by stress, trauma, or physical or mental illness.