Scale development and validation in a school-based and clinical sample. The utility of the bifactor model in understanding unique components of anxiety sensitivity in a South Korean sample. Asian Journal of Psychiatry, 22,
Dr John Downs, of whom the condition is so named after, found that children who were born with these similar characteristics and that after testing were complete. Every pregnant woman is at risk of having a Downs Syndrome child.
For example 1 in 1, women who are 28yrs will give birth to a child with this condition. However, the risk is much greater with a woman who is 38yrs, increasing the risk by approximately 1 in births.
Research into the origins of Downs Syndrome has been carried out worldwide all with one common question in mind; is the condition genetic, thus making it hereditary? However, research that has been carried out has found, that children born with this condition have the same genetic makeup as a child born without the condition.
However, there is one difference and that is a child born with Downs Syndrome, will have an extra chromosome. By having just one chromosome extra is enough to tip the finely tuned balance of the human body and will in turn produce physical and intellectual characteristics that are found in Downs Syndrome.
It is commonly known that genes are passed from parent to child. And those most have two copies of every gene. In general one copy is passed on from both mother and father at the time of conception. The Downs syndrome dissertation are made up of DNA deoxyribonucleic acid. The arrangement of chemicals in the DNA strand is different for every gene Cunningham, The genes are grouped together in long thin, thread like strands called chromosomes.
Therefore, it is these chromosomes that carry the essential information, which will determine Downs syndrome dissertation we look, how healthy we are and whether there will be congenital defects when we are born.
This study will look at the effects of Downs Syndrome by drawing upon a number of resources of information such as the Internet, pamphlets, books and an actual case study of a child who suffers with the condition.
Genetics of Downs Syndrome Downs Syndrome occurs when a child is born with the extra chromosome 21 materials in their cell structure. Trisomy means that there are 3 tri copies of chromosome somy 21 see figure, 1.
In which all the cells carry the extra chromosome Therefor, Downs Syndrome arises from a change in gene quantity rather than a quality of genes. It is not known why this condition occurs; it is for this reason that it is so different from other genetic disorders such as Cystic Fibrosis and Sickle Cell Anaemia.
Which, the inheritance of these diseases or disorders, can be traced back through family medical histories.
These people all have rare types of Translocation see bullet point 2, for explanation of this type Carr, This could suggest that it is very unusual for parents to have more than one Downs Syndrome child or for relatives of these parents to also have a child with the condition.
Regular Trisomy 21 occurs when an unusual cell division has taken place, which has produced either an egg or a sperm with 24 chromosomes instead of When this egg or sperm fuses with an ordinary egg or sperm, the first cell of the developing baby has 47 chromosomes instead of There is no way of predicting whether a person is more or less likely to produce eggs or sperm with 24 chromosomes Carr, The extra chromosome can come from an uneven division of the chromosomes called non-disfunction at either the first or second meiotic division, in either parent.
At present it is suggested that one child with Downs Syndrome is born in every total births. Also there are more conceived than are born, because the chance of miscarriage is higher if the foetus has Downs Syndrome WHO, As yet the reason why older women are more likely to have a child born with this condition, is still unknown.
However, there are two current theories available which attempt to explain why it does happen. Carr suggests that all women have a certain amount of extra ovum, which contain the extra chromosome. Another theory looks at the rate of Trisomic conceptions are the same at all ages, but that affected pregnancies are more likely to go full term in older women, rather than end in miscarriage?
The assumption of both these theories is that the body recognises that this is a late pregnancy and may be the last or only pregnancy that the woman can achieve.
Thus the body tries to make sure the pregnancy goes to full term Cunningham, Parents with one child, who suffer with this condition, are usually informed that the chance of conceiving another child with the Down syndrome condition is about 1 in Very few families are known to have more than one child with Downs Syndrome.
So in reality the chance is probably a lot less than this statistic. But have an additional part of chromosome 21, which is attached to another chromosome. This usually arises when the small arms of the chromosome 21 and other chromosomes break and that the two remaining long arms join together at their exposed ends.
It is this process of chromosomes breaking and then fusing back together which is known as "Translocation", because the chromosome material has transferred its location. It must be pointed out that the features and characteristics of Downs Syndrome are no different from those of a child with regular Trisomy 21 Selikowitz, Down Syndrome Essay Examples.
45 total results. An Introduction to the Medical Genetic Condition Down Syndrome.
2, words. 6 pages. The Challenges of Coping With Down Syndrome. 3, words. 9 pages. A Study of the Causes and Effects of Down Syndrome and Spina Bifida. words. 1 page. A SPELLING-BASED PHONICS APPROACH TO WORD INSTRUCTION FOR CHILDREN WITH DOWN SYNDROME A Dissertation by AMY RENEE WILLIAMS Submitted to the Graduate School Appalachian State University in partial fulfillment of the requirements for the degree of DOCTOR OF EDUCATION August A small group of editors of general medical journals met informally in Vancouver, British Columbia, in to establish guidelines for the format of manuscripts submitted to their journals.
The. Developmental disabilities can be physical, mental, or both. The problems are usually life-long, but therapy can help. Learn more. such as learning disorders.
Or the problem can be both physical and mental, such as Down syndrome. The problems are usually life-long, and can affect everyday living.
There are many causes of developmental. Fitbit Research Library. The following publications have used Fitbit devices in research. Know of another study not on our list?
Send it to us. ETIOLOGY OF DOWN SYNDROME. Down syndrome is the most common genetic cause of intellectual disability, occurring in approximately 1 in live births (Centers for Disease Control and Prevention, ).Ninety-eight percent of cases of Down syndrome are caused by an extra copy of chromosome 21 (Trisomy 21).