Down Syndrome: A Congenital Disease

Answer: The most common form of Down syndrome is known as Trisomy 21, a condition where individuals have 47 chromosomes in each cell instead of 46. This is caused by an error in cell division called nondisjunction, which leaves a sperm or egg cell with an extra copy of chromosome 21 before or at conception. To the genes when the cell division occurs is when the extra chromosome goes to find a cell and attaches

John Langdon Down was the first to write an accurate description of Down syndrome . Down syndrome is one of the most common disorders among children in America, which is why it is so well known. Down syndrome has three different types: trisomy 21, mosaicism, and translocation(1). When it comes to the different types trisomy 21 is the most common. This is when every cell has an extra chromosome 21 and babies with this type tend to have a wide variety of different symptoms. Mosaicism is the next common form of Down syndrome. When it comes to this type the individual has extra chromosome 21 in only some of their cells. Babies with mosaicism tend to have fewer symptoms. For translocation, the kids who have this only have one extra piece of chromosome

Also known as Trisomy 21, Down Syndrome is an illness due to which an superfluous genetic structure leads to delays in the manner in which a child’s mental and physical faculties develop.

When a baby is conceived, the baby receives 23 chromosomes from each parent, equaling 46 chromosomes. Sometimes during this creation a sperm or egg cell can causes that cell to contain 24 chromosomes. When this abnormal cell is included in the conception of a baby, that baby will have 47 chromosomes. The extra chromosome causes Down syndrome. After fertilization; cells start to divide rapidly. Depending on how the cell divides determines what type of Down syndrome the child has. Mosaic Down syndrome is obtained when a cell divides abnormally, creating a string of cells with the extra chromosome. A child with Mosaic Down syndrome has both cells: the normal 46 chromosomes, and the Down syndrome 47 chromosomes. It is believed that babies with Mosaic Down syndrome experience mild symptoms of the disorder.

Down Syndrome is also known as Trisomy 21, is a disorder that occurs when an extra chromosome is present on the 21st chromosome. There

One of the most common genetic birth defects is Down syndrome which is a congenital disorder caused from a chromosome defect. It causes impairments and physical abnormalities. This is a condition where a child is born with an extra copy of their 21st chromosome. According to the National Down Syndrome Society (NDSS), 1 in 700 babies are born with DS. There is not an exact cause of how DS happens but there is an explanation as to what happens. When there is any case of reproduction, genes from both parents are passed to the children. Within these genes there are chromosomes and the child is supposed to receive 23 pairs of chromosomes or 46 total. Children with DS end up with 3 copies or an extra partial copy of chromosome 21 instead of 2

Down syndrome is a disease in which chromosome 21 has extra genetic material delaying the way a child develops mentally and physically.

In every cell in the body there is a nucleus and this is the location where genetic material lives. These genes are responsible for carrying the inherited traits that we get from our parents, in the form of chromosomes. Normally each cell contains a nucleus with a pair of 23 chromosomes, half of which come from mom and the other half coming from dad. The genotype in the example given is that of a person with Down syndrome. Down syndrome is a chromosomal disorder that results in learning disabilities and physical abnormalities. Most cases of Down syndrome are caused by an extra copy of chromosome 21. An extra chromosome, making 3 of one kind, is called a trisomy and the most common is trisomy 21. This may be a chromosome given to the child from the father but a portion of mothers can also pass the chromosome to the child, mothers that get pregnant over 35 years of age have been shown to pass on the chromosome. Physical appearance will lead a doctor to suspect a patient with Down syndrome but a blood test is needed to determine if the patient has the extra chromosome. Down syndrome can affect many parts of the body, there are

Down syndrome a mistake in the cell division called non-disjunction. Two other minor types of chromosomal abnormalities, “mosaicism” and “translocation”, are also causes of Down syndrome. Mosaicism is the state of being composed of cells of two genetically different types. Translocation is the exchange

Down syndrome is a genetic defect attributed to an abnormality of the human chromosome 21. The National Down Syndrome Society (NDSS), a national advocate organization for the value, acceptance and inclusion of people with Down syndrome, notes that modern research has successfully identified three types of Down syndrome. The NDSS reports that Nondisjunction Trisomy 21, in which there are three copies of chromosome 21 instead of two, is the most common type of Down syndrome. Prior to or at the point of conception, a pair of 21st chromosomes in either the

Down syndrome is a chromosomal condition that affects 1in every 700 kids. Down syndrome is when a child has and extra copy of chromosome 21. Down syndrome has many ways of telling if the child has down syndrome, like physical features. You can also tell if a child has down syndrome based on how they act. There are different ways of obtaining down syndrome. Kids with down syndrome are no different than kids that were born with the normal set of chromosomes, they just act a little different and need a little bit more help.

The genetic cause of down syndrome is when people have 47 chromosomes in each cell instead of 46, which is what most people are born with. Down syndrome, also known as Trisomy 21, is a genetic disorder associated with an extra chromosome 21. Trisomy 21 is caused by an error in cell division, which leaves a reproductive cell with an extra copy of chromosome 21. The

There are three types of Down syndrome trisomy 21 (nondisjunction), translocation and mosaicism. Trisomy 21 is caused by an error in cell division which is called nondisjunction. Nondisjunction results when the embryo gets three copies of chromosome 21 instead of two. This usually occurs at or prior to conception, a pair of 21st chromosomes in either the sperm or the eggs fails to separate. Since this occurs so early on, the extra chromosome is then replicated in every cell of the body. This type of Down syndrome accounts for 95% of cases (“What”). Translocation accounts for about 4% of cases. In this types the total number of chromosomes in the cells remain 46, but an additional full or partial copy of chromosome 21 attaches to another chromosome

Down syndrome, also known as Trisomy 21, is a genetic disorder. It is caused by an abnormality in the number of chromosomes. DNA (deoxyribose nucleic acid) chromosomes are originate in the cell and are comprised of genes, which decide hereditary traits (Epstein pg.199). If a person has an extra chromosome on chromosome number 21 out of 23 they will have Down syndrome. The extra chromosome may delay the growth of a child’s physical and mental development which may lead to mental retardation. Normally, a person has 46 chromosomes, and will receive 23 pairs of chromosomes from the mother and 23 from the father totaling 46. But someone with Down syndrome will have 47. Although many theories have been developed, it is not known what actually

Nondisjunction is the error in cell division that usually causes Down syndrome. Nondisjunction causes an embryo to have three copies of chromosome 21 instead of the usual two. Sometime prior to, or at conception, a pair of number 21 chromosomes, either in the sperm or the egg, fail to separate. Trisomy 21 happens in the egg 95 percent of cases and in the sperm only five percent. The extra chromosome replicates in every cell of the body as the embryo develops. Trisomy 21 accounts for about 95% of cases.