Definition of Down Syndrome Down Syndrome, congenital malformation accompanied by moderate to severe mental retardation, and caused by a chromosomal abnormality. The chance of getting Down syndrome is approximately one in births, but the risk varies with the age of the mother. The incidence of Down syndrome in children born to year-old mothers is approximately 1 in ; the risk increases to approximately 1 in for women older than 40 years. Prenatal tests like amniocentesis and chronic villous sampling can be used to detect the chromosomal abnormality causing Down syndrome. Maternal blood tests can also suggest the presence of a fetus with Down syndrome when levels of alpha-fetoprotein are lower than usual, or when levels of unconjugated estriol and human chorionic gonadotrophin are abnormal. The chromosomal abnormality which generally causes Down syndrome is trisomy, or the presence of three 21st chromosomes.
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Chromosome abnormality - Wikipedia
Syndrome is the name for babies born with a disorder related to their chromosomes. It is caused when meiosis occurs and an error occurs in the cells development. The Medical and Psychological Models of Abnormality Works Cited Missing By the term "medical model" of abnormality we mean the biological model, what the. An individual is born with an abnormality of the arch in back of the spine. This abnormality most commonly. Physical Brain Abnormality a Possible Cause of Schizophrenia Neuropathologists have been researching schizophrenia for approximately a hundred years.
This essay explores what is abnormality with respect to the different ways by which it can be defined such as statistical infrequency, deviation from social norms, failure to function adequately and deviating from ideal mental health and viewing their limitations and by using different models such as Psychodynamic, Cognitive, Behavioural and Medical model in identifying what is abnormal and their treatment. But the essay would focus more on the medical model and the different approaches used to define abnormality all have their focus point which is to distinguish between what is normal and abnormal. Looking at this bell-shaped curve, the majority of individuals are clustered around the highest point of the curve, which is known as the average.
Human Genetic Disorder is a kind of illness which is caused by chromosomes or genes abnormalities. Some disorders like cancer are in part of genetic disorders but they can also be caused by environmental factors. Many disorders are quite rare and they affect one person in a million. There are some types of recessive gene disorders which have an advantage in heterozygous states in some environments. Both genetic and environmental factors play a role in development of any kind of disorder.