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What else can I help you with?
What is an example of a lethal mutation?
Albinism, where the animal (or person) has no melanin (color) in their skin or hair, so they sunburn easily and are prone to skin cancer. The irises of their eyes are pink, so their eyes are sun-sensitive. Animals with no coloring of their skin can not hide from predators, so they don't live long in the wild. I don't think albinism is technically a lethal mutation. I think an example of lethal mutation is the overo gene in horses. Two copies of it produce a foal that dies shortly after birth due to problems with its digestive system. Any mutation that causes termination of pregnancy is a lethal mutation.
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 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.
Is Edwards syndrome autosomal or sex-linked?
Down Syndrome is a trisomy of the 21st chromosome as opposed to an allelic inheritance through the X chromosome. Trisomy is a somatic disorder caused by improper division during gametogenesis (usually of the ovum) that results in 3 copies of the 21st chromosome in the egg once it is fertilized.
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)
Can trisomy 18 be cured?
There is no cure for trisomy 18
What are mutation that result in death?
These are called fatal genetic mutations. Same examples are: Tay-Sachs disease, Neimann-Pick disease, Trisomy 18 and Trisomy 13 are "Edwards Syndrome" and "Patau Syndrome," respectively and Cystic fibrosis
What type of mutation causes Edwards' syndrome?
An extra copy of Chromosome 18
What is an example of a lethal mutation?
Albinism, where the animal (or person) has no melanin (color) in their skin or hair, so they sunburn easily and are prone to skin cancer. The irises of their eyes are pink, so their eyes are sun-sensitive. Animals with no coloring of their skin can not hide from predators, so they don't live long in the wild. I don't think albinism is technically a lethal mutation. I think an example of lethal mutation is the overo gene in horses. Two copies of it produce a foal that dies shortly after birth due to problems with its digestive system. Any mutation that causes termination of pregnancy is a lethal mutation.
Which genetic disorder does an extra chromosome cause?
An extra chromosome can cause genetic disorders such as Down syndrome, which is caused by an extra copy of chromosome 21. This leads to developmental delays, intellectual disabilities, and certain physical characteristics.
Is trisomy 18 sex-linked?
yes
What trisomy causes Down syndrome?
Well, honey, Down syndrome is caused by an extra copy of chromosome 21, also known as trisomy 21. It's like having a bonus chromosome that messes with the genetic party. So, to put it simply, trisomy 21 is the culprit behind Down syndrome.
Where can you find information on Down syndrome in canines?
I searched for canine trisomy in the internet. It looks like they can have a trisomy 1 whcih causes some types of cancers, trysomy 13 (thyroid issues) and 18. The word is actually trisomyism. Downs is trisomy 21. Humans are also sometimes born with a trisomy 19. Each has it's own name after the doctor who discovered them, Edwards, Downs, and Bach. Did not find any canine with trisomy 21
Can Trisomy 18 be detected?
Yes, prenatal screening tests like ultrasound and blood tests can detect the presence of Trisomy 18 in a fetus. Additionally, diagnostic tests such as amniocentesis or chorionic villus sampling can confirm the diagnosis.
What is another name for trisomy 18?
Edward's syndrome
What is Edwards' syndrome also called?
Trisomy 18 syndrome
What is Trisomy 18 syndrome also called?
Edwards' syndrome
