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My son is 3 years old with full trisomy 18. I have some videos on YouTube that I've put together with lots of trisomy families I've found on facebook. My awareness video is of over 100 surviving kids of trisomy 13 and 18. Just go to youtube and search 'trisomy awareness' or trisomy advocacy' and you'll find them. There is also a website called 'livingwithtrisomy13.com' that has stories of over 100 trisomy 13 kids on it. I, also, personally know of two kids with trisomy 8. So, yes, there are cases of kids surviving trisomies other than trisomy 21 (Down syndrome). :)
Alisha Hauber
What else can I help you with?
What is trisomy 16?
Edwards' syndrome is caused by an extra (third) copy of chromosome 18. The extra chromosome is lethal for most babies born with this condition. It causes major physical abnormalities and severe mental retardation. Very few children afflicted with this syndrome survive beyond the first year.
Aneuploid human embryos are least likely to survive except those involving?
Aneuploid human embryos are least likely to survive, except in cases involving trisomy 21 (Down syndrome). Trisomy 21 is the most common chromosomal disorder compatible with life, although it comes with its own set of health challenges.
What chromosomes is the code for down syndrome located on?
== == Down syndrome, also known as "Trisomy 21," is not caused by a single particular gene or DNA sequence. Rather, Trisomy 21 is caused by the presence of an "extra" chromosome 21 in the set inherited by a Down syndrome patient. The normal chromosome number is 46 (consisting of 2 sex chromosomes, XX or XY, and 44 non-sex chromosomes); Trisomy 21 patients thus have 47 and are denoted as 47, t21.
Are cases of trisomy passed on to the next generation?
Trisomy is usually not inherited but occurs as a random event during cell division. However, in some cases, trisomy can be inherited from a parent with a balanced translocation. It is important to consult with a genetic counselor to understand the specific risks and inheritance patterns associated with trisomy.
Why is monosomy worse than trisomy?
Monosomy occurs when one chromosome is absent from the normal diploid number. This is referred to as aneuploidy which is the loss or gain of a chromosome during meiosis.An example of monosomy is Turner Syndrome. One of the sex chromosomes is missing. In an unaffected female there are 2 'X' chromosomes. But in Turner Syndrome there is one sex chromosome missing.Trisomy occurs when there is three copies of a chromosome instead of the normal diploid number. This is also referred to as aneuploidy because there was an extra chromosome added hence, an abnormal amount of chromosomes.An example of trisomy is in Trisomy 21(Downs Syndrome) in which chromosome 21 has an extra chromosome.
What common condition is caused by the presence of three copies of chromosome 21?
Most cases of Down syndrome result from trisomy 21, which means each cell in the body has three copies of chromosome 21 instead of the usual two copies. The extra genetic material disrupts the normal course of development, causing the characteristic features of Down syndrome.Hope this helps.
Is trisomy 21 downs common?
== == Trisomy 21 is more of a chromosome abnormality/birth defect than a disease. It is also called Down syndrome. You cannot "catch" it; it is not infectious. According to statistics, women over 35 have a higher chance of bearing a baby with Trisomy 21 than do younger women. The theory is that, as we age, our chromosomes become "sticky" during the process of division. The amount of the chromosome that breaks off determines how functional or affected the offspring will be. Although I have a bachelor's degree in genetics, you may want to get a more in-depth answer from a doctor or a genetic counselor.
How does the inheritance of chromosome 21 lead to Down Syndrome?
Down Syndrome is AKA Trisomy 21. there are 3 autosomes on the 23 chromosome. it isn't x linked, but is randomly mutated and in some cases autosomal.
Do all cases of down syndrome have a complete extra chromosome?
No, not all cases of Down syndrome involve a complete extra chromosome. The most common form, known as trisomy 21, consists of an entire extra chromosome 21, resulting in three copies instead of the usual two. However, some cases are due to a Robertsonian translocation, where a part of chromosome 21 is attached to another chromosome, or mosaic Down syndrome, where some cells have the extra chromosome while others do not.
What often happens to a fetus with Patau Syndrome?
In many cases, spontaneous abortion (miscarriage ) occurs and the fetus does not survive to term. In other cases, the affected individual is stillborn.
Is trisomy 18 fatal?
Trisomy 18, also known as Edwards syndrome, is a genetic condition caused by an extra chromosome 18. It results in severe developmental delays and multiple physical abnormalities that often lead to serious health complications, with many affected individuals not surviving beyond the first year of life. The prognosis for individuals with trisomy 18 is generally poor, with most cases resulting in early mortality.
What is the least-common trisomy?
Trisomy 13 Trisomy 13, or Patau�s syndrome is the least common of the live-born trisomy disorders, with an incidence of 1 in 5000 to 1 in 2,000 live births, with affected males equal to affected females. 75% of trisomy 13 cases are due to maternal NDJ, 20% are due to a translocation, and 5% are due to mosaicism. The major midline dysmorphic features of trisomy 13 are due to a defect in the fusion of the midline prechordial mesoderm in the first three weeks of gestation. Trisomy 13 tends to present with more severe craniofacial and midline defects than are found in Trisomy 18 or 21. Trisomy 13 has the following clinical features: # Holoporsencephaly # Polydactly # Seizures # Deafness # Microcephaly # Midline Cleft lip # Midline Cleft palate # Abnormal ears # Sloping forehead # Omphalocele # Cardiac and renal anomalies # Mental retardation. Trisomy 13 is also confirmed by karyotype with FISH analysis. 44% of these patients die within 1 month, and > 70% die within one year. Severe mental retardation exists in all survivors as per (http://pedclerk.bsd.uchicago.edu/chromosomalabnormalities.html)
