University of washington scientists have succeeded in removing the extra copy of chromosome 21 in cell cultures derived from a person with down syndrome, a condition in which the body's cells contain three copies of chromosome 21 rather than the usual pair a triplicate of any chromosome is a. Having a child with down syndrome breaks down social barriers without that little extra chromosome, she makes me realize of many things from negative to positve. Unlike down syndrome, which also is caused by an extra chromosome, the developmental issues caused by trisomy 18 are associated with more medical complications that are more potentially life-threatening in the early months and years of life.
Down syndrome definition down syndrome  (ds) is the most common cause of mental retardation  and malformation in a newborn it occurs because of the presence of an extra chromosome. Down syndrome is the most common genetic condition in the united states it was first described in 1866 and is named after john langdon down, the doctor who first identified the syndrome the cause of down syndrome, also known as trisomy 21, was discovered in 1959 in the united states, down. The reason some individuals are born with down syndrome is because of an extra chromosome, this chromosome, which carries number 21 it is also known as trisomy 21 having this sort of disability, does not truly affect their life in a way they are not able to live, but it affects their cognitive levels, their physical growth of the child with. Common down syndrome effects include mental retardation, thyroid problems, and eye problems this emedtv article discusses these and other possible effects of down syndrome, such as hearing problems and congenital heart disease.
If you mean what are the effects if a human has other than the 46 chromosomes most of us come with, it depends on which chromosome(s) is missing or has an extra copy. Down syndrome (sometimes called down's syndrome) is a condition in which a child is born with an extra copy of their 21st chromosome — hence its other name, trisomy 21 this causes physical. Down syndrome is a common genetic disorder that affects about 400,000 americans each year, about 6,000 babies are born in the united states with down syndrome, a disorder caused by abnormal cell division that results in an extra chromosome, specifically chromosome 21 the severity of the condition.
Sometimes, a parent who does not have down syndrome may carry a translocation in chromosome 21 that can be passed on to children and cause down syndrome studying the parents' chromosomes can reveal whether this is the cause of the syndrome. In most cases, down syndrome occurs when there is an extra copy of chromosome 21 this form of down syndrome is called trisomy 21 the extra chromosome causes problems with the way the body and brain develop down syndrome is one of the most common causes of birth defects down syndrome symptoms. Xyy syndrome is a rare chromosomal disorder caused by the presence of an extra y chromosome normally, males have 46 chromosomes including one x and one y chromosome males with xyy syndrome have 47 chromosomes, two of which are y chromosomes.
Unlike most editing & proofreading services, we edit for everything: grammar, spelling, punctuation, idea flow, sentence structure, & more get started now. This is checked in a lab to find the extra chromosome how is down syndrome treated in a child and possible side effects of all treatments write down the. But a baby with down syndrome has an extra chromosome (47 instead of 46) or one chromosome has an extra part this extra genetic material causes problems with the way their bodies develop health problems are common.
Down syndrome synonyms: down's syndrome, down's, trisomy 21 the genetic cause of down syndrome, an extra copy of chromosome 21, was discovered even a mild. Some people wonder what down syndrome is how it is caused, and how it is treated the causes and effects of down syndrome is when there is an extra 21st chromosome the effects include some birth defects and health problems the physical features are different from someone without down syndrome. In a very small percentage of cases, down syndrome results from an extra copy of chromosome 21 in only some of the body's cells in these people, the condition is called mosaic down syndrome.