Down Syndrome Of Chromosome 21 Essay

Words: 745

Pages: 3

Open Document

Chromosome 21 normally contains only two copies (a Pair) of chromosomes, as do the rest of the 22 pairs of chromosomes which make up a total of 23 pairs of chromosomes (46 in each cell,) chromosome 21 is the smallest human autosome, it contains 48 million nucleotides, the nucleotides are the building material of DND, and makes up between 1.5 and 2 percent of the total DNA in cells. When each cells in the human body contains three copies of chromosome 21, known as trisomy 21, it results in a medical condition known as “Down Syndrome,” this is a chromosomal condition which affects several characteristics visual in an infant, these include: intellectual disability, facial appearance, and weak muscle tone.

Down syndrome can also happen during …show more content…
There can also be a missing segment of the chromosome in each cell, this condition will be known as “partial monosomy 21,” and another condition where a structure forms as a circle which is called Chromosome 21 Ring, or r21, Ring 21, and Ring 21, Chromosome, this is a rare condition where the chromosome 21 has a breakage at both ends and the chromosome arms join at the ends forming a circle. There is usually a loss of genetic material when this happens which may result in numerous symptoms depending on the amount of genetic materials that have been lost. In cases where very a little amount of genetic materials that have been lost there may be no symptoms of this disorder while the person is an infant, however, in the case where there is a significant loss of genetic materials the symptoms may include: mental retardation and other abnormalities which are visible in the face and eyes of the infant, there could also be abnormalities which are not visible such as abnormalities of the skeleton (sometimes visible) and internal

Importance Of Teaching Vocabulary

According to this handbook Down syndrome is the world's most common chromosomal disorder and it is the reason of intellectual disability. Here is mentioned that Down syndrome is not an illness or disease, it happens in one of every 700 to 900 birth around the world (2009, p.6). In the preface of the handbook developmental profile for learners with Down syndrome is introduced which is developed by Professor Sue Buckley and colleagues at Down Syndrome Educational International (http://www…

Words 710 - Pages 3

Gene Therapy Essays

Down syndrome Down syndrome also known as Trisomy 21 is a set of mental and physical symptoms that are caused by having an extra copy of the chromosome 21. People that do not have Down syndrome have only 2 copies of the Trisomy 21, but people with Down syndrome have 3 copies. As a result of having the 3 copies instead of the 2 it will change the person’s body and brain’s normal development. Depending on the person the Down syndrome can either be a mild or severe case. Many people with Down syndrome…

Words 562 - Pages 3

Alzheimers Disease Essay

simplest tasks”. (nih.gov) Alzheimer’s disease is very prevalent and affects a good portion of people in the world. In fact, “It is estimated that as many as 5.1 million Americans may have Alzheimer's disease”. (Alzheimer’s foundation of America) In this essay I will go into great detail about the devastating disease known as Alzheimer’s and share my personal experience with this disease. Most disorders/diseases are named after someone and Alzheimer’s disease is no exception. Alzheimer’s disease is named…

Words 2678 - Pages 11

Crispr In Brave New World

certain traits depending on what social class the baby will be placed in. A new method of genetic modification has been discovered called CRISPR which allows scientists to modify a specific genetic sequence more easily and cheaper than before. In this essay I will explain what CRISPR is and the benefits and drawbacks of this relatively new method of genome editing as well as my opinion on whether or not I agree with it. In Brave New World the scientists are able to modify genetics to get specific traits…

Words 897 - Pages 4

Essay on Brain and Social Learning Theory

PSYC 224 – Spring 2015 Exam #1 Essay Questions 1. What aspect of behaviorism made it attractive to critics of the psychoanalytic perspective? How did Piaget’s theory respond to a major limitation of behaviorism? Psychoanalytic theory emphasized on the individual's unique life. However the theory was criticized because many of its ideas were too vague to be measured or tested for. They mainly focused on case studies. Behaviorism studied directly observable behaviors through stimuli and responses…

Words 3629 - Pages 15

Essay on Psychology and Advanced Placement Course

through which they can filter life’s experiences for the future. What you need to know about grading and classroom procedures… Course Grades – Grades are determined by weighted categories based on the following percentages: Tests 40 %, Projects/Essays/Vocabulary Quizzes 30 %, Classwork/Homework 20 %, Study Guides 10% Makeup work—refer to school policy. Classroom Expectations – students are expected to arrive on time and be prepared and attentive. Note-taking is recommended. Supplies suggested:…

Words 3746 - Pages 15

Animal Testing Synthesis Promptttt Essay

and test products. Carefully read the following six sources, then synthesize information from at least three of the sources and incorporate it into a coherent, well-developed essay that takes a position on whether animal testing is or is not necessary in the United States today. Your argument should be the focus of your essay. Use the sources to develop your argument and explain the reasoning for it. Avoid merely summarizing the sources. Indicate clearly which sources you are drawing from, whether…

Words 5301 - Pages 22

Essay on u r stinjy

Mongoloid /ˈmɒŋ.ɡə.lɔɪd/[1][2] refers to populations that share certain phenotypic traits such as epicanthic fold and other physical traits common in most of Asia (including Central Asia, Southeast Asia, East Asia, Siberia and parts of South Asia and West Asia), the Arctic, the Americas and most of the Pacific Islands. In terms of population, they are the most numerous race – more than one third of the human race. The word is formed by the base word "Mongol" and the suffix "-oid" which means "resembling"…

Words 7504 - Pages 31