0
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.
Wiki User
∙ 16y ago
Wiki User
∙ 15y agoA trisomy is a condition in which a person has three copies of a chromosome instead of the usual two copies. Trisomy 16 refers to three copies of chromosome 16. A fetus with Full Trisomy 16 - three copies in every cell - will not survive and will be miscarried. A fetus with Mosaic Trisomy 16 - three copies in some cells but not all - can survive.
Add your answer:
Earn +20 pts
Trisomy is a mutation that results in a cell having an extra?
A trisomy is a condition in which a person has three copies of a chromosome instead of the usual two copies. A person can have full trisomy (three copies in every cell) or mosaic trisomy (three copies in some cells but not all).
What is a duplicated chromosome?
"trisomy"
Is trisomy 18 fatal?
Most children born with trisomy 18 die within their first year of life
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)
Why is a karyotype called a trisomy?
bacause it is the same part
Which genetic conditions results from a problem with segregation?
Trisomy 16
What is the medical term of trisomy 16?
It is called Patau syndrome and is a chromosomal abnormality
Is color blindness monosomy or trisomy?
trisomy
Can trisomy 18 be cured?
There is no cure for trisomy 18
What type of condition is trisomy?
Trisomy an abnormality in chromosomal development.
What is a common autosomal trisomy?
Something tells me that trisomy 21 is not really the most common, but it is the common among babies that actually live. Other trisomies common among live births are those of the 13th and 18th chromosome. Trisomy 16 is the most common known disorder of miscarried fetuses. Trisomy is caused by nondisjunction of a pair of chromosomes during meiosis or mitosis. What causes nondisjunction? If we could figure that out, we might be able put trisomies in the past.
Can Trisomy 18 be detected?
Trisomy 18 can be detected before birth
Is klinefelter's syndrome monosomy or trisomy?
A trisomy. A monosomy is when there is only one of a chromosome. A trisomy is when there are three of a chromosome. In Klinefelter's syndrome, there are three sex chromosomes.
Which genetic disorder does an extra chromosome cause?
trisomy There several types of trisomy, the most well known is probably Down syndrome, which is trisomy 21.
What trisomy causes Down syndrome?
Down syndrome is caused by the presence of a third chromosome 21
How does nondisjunction cause Trisomy 21?
it can cause Trisomy 21 because an extra chromosome can be added.
What are the major chromosomal changes in trisomy?
Trisomy is defined as the presence of three homologous chromosomes. For example, Down's Syndrome is caused by trisomy-21, 3 copies of chromosome 21.
