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Down Syndrome
What a difference an extra chromosome can make. Here we explore the misconceptions -- as well as the ups and downs -- of Down Syndrome, a congenital genetic disorder that is caused by the presence of an extra 21st chromosome. The affected person is mildly to moderately handicapped, short in stature, and has a flattened facial profile.
693 Questions
Is down's syndrome a result of aneuploidy?
No. Down Syndrome is caused by polyploidy of 21st chromosome (trisomy-2n+1 condition).
How does someone with Down syndrome get that extra chromosome?
During meiosis homologous chromosomes are separated and only one copy of each chromosome goes into the gamete. If they aren't separated correctly, both copies may go into the gamete. After fertilisation, the embryo will contain 3 copies of that chromosome. If this occurs with chromosome 21, it will result in Down Syndrome.
Is non disjunction the only cause of down syndrome?
No.
There are three different types of Down syndrome: Standard Trisomy 21, Translocation, and Mosaicism. Standard Trisomy 21 is when the extra chromosome 21 comes from either the egg or sperm cell. Between 90% and 95% of all Down syndrome is Standard Trisomy 21.
When a child is diagnosed with DS, this means that they were born with an extra chromosome 21. Giving them a total of 47 rather than 46.This extra chromosome delays physical and educational development.
Which disorder is characterized by an abnormal number of autosomes?
The type of disorder that is characterized by an abnormal number of autosomes is called as "down syndrome." This is even identified when a woman is on her pregnancy stage.
Does vitamin therapy help kids with Down syndrome?
Not enough to do anything about the basic condition
It is more accurate.
How a person treat himself for Cheyletiellosis?
Use any pet flea treatment, adjusting dosage for your weight, for 2 months.
If you have a slow-growing fetus could that be due to Down syndrome?
You really need to talk to your maternity care provider about this as there are so many different reasons why a fetus may be on the small side.
What type of leukemia is associated with Down syndrome?
Acute Lymphoblastic Leukemia (ALL) and Down Syndrome both have been associated with mutations in the JAK2 gene.
Is the extra copy of Chromosome 21 that causes Down syndrome dominant or recessive?
Down syndrome is neither caused by dominant or recessive chromosomes it is simply caused by an error in the translation process of chromosome 21.
Sotos syndrome is a genetic condition causing excessive growth and a distinctive head and facial appearance. It has in the past been known as cerebral gigantism. It is often accompanied by delayed development, low muscle tone, and impaired speech.
Do you need a caregiver when you have down syndrome?
People with high functioning down syndrome can in some cases lead completely independent lives.
Syndrome evidence is the competence in theory of mind. Thsi is used in many court cases.
Is the face of a Down syndrome infant symmetrical or asymmetrical?
The face of a down syndrome infant is symetrical.
Amok.
What was the original purpose of amniocentesis?
Since the mid-1970s, amniocentesis has been used routinely to test for Down syndrome, by far the most common, nonhereditary, genetic birth defect, afflicting about one in every 1,000 babies.
