No, Unless you have Down Syndrome
Since Down Syndrome is not genetic and is a trisomy, dominant and recessive genes do not play a role and it is possible for two down syndrome parents to have a child without down syndrome.
Having an extra copy of chromosome 21. You are supposed to have 2; when you have 3 (trisomy 21), Down's Syndrome is the result.
You could try to get more information from the Down syndrome organizations in South Africa: 1) DSSA (Down Syndrome South Africa); and 2) the Down Syndrome Association of the Western Cape. Click on the Related Links below.
Retardation / Mutation (Down Syndrome)
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47There are 47 chromosomes in someone with Down syndrome; the 21st pair has an extra chromosome. Most people have 46 chromosomes. Down syndrome is also known as "Trisomy 21" - a reference to the fact that someone with Down syndrome has 3 pairs of chromosomes on their 21st pair.
its where some cells are "down syndrome" cells and some are "typical" cells. meaning some cells have three sets of the 21st chromosome and some have the normal 2 sets.
No, it is possible for 2 parents with down syndrome to produce a child with no non-disjunction disorder because of a gamete is produced with an extra copy of the chromosomes.
No, there is no way to know that a fetus has amniotic band syndrome until they are born. Once the baby is born, they will have a treatment plan tailored just for them since no 2 cases of this are ever the same.
Trisomy means having three copies of a chromosomes. Turner's syndrome is NOT an example of trisomy. Someone with Turner's syndrome has only one X chromosome. Down's syndrome IS an example of trisomy. Someone with Down's syndrome has 3 copies of chromosome 21. Klinefelter's syndrome is a tricky one. On one hand, it would be considered trisomy because they have 3 sex chromosomes. However, they are not all the SAME sex chromosomes. Someone with Klinefelter's has 2 X chromosomes and one Y chromosome.