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X Chromosome Disorders
ALGS: Alagille syndrome (algs) is a complex multisystem disorder involving primarily the liver, heart, eyes, face, and skeleton. The two genes in which mutations are known to cause algs are jag1 and notch2. Mutations in jag1 are known to cause about 94%-96% of cases of algs. Mutations in notch2 are known to cause algs in 1%-2% of individuals. ...Read moreSee 1 more doctor answer
See below: Homocystinuria is a genetic disorder which affects the metabolism of the aminoacid methionine. It is inherited as a autosomal recessive trait trait, ie the child must inherit the non working gene from both the parents to be affected. It presents as failure to thrive, mental retardation, visual problems and bone problems. ...Read more
Can comprehensive chromosome screening (CCS) in IVF screen for (1) partial trisomy, (2) unbalanced translocation, and (3) balanced translocation? Does testing parental karyotyping before CCS help?
Test for Aneuploidy: Aneuploidy is the term used to describe any embryo with either too many or too few chromosomes. It is the cause of greater than 60% of miscarriages, as well as the most likely reason that patients do not get pregnant from an IVF cycle. The purpose of CCS is to analyze, select and transfer only embryos that do not have abnormalities in their number of chromosomes. A genetic consult is needed; ...Read more
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Mental retardation: Mental retardation, autistic behavior, large testicles, long face, and large ears. Mainly seen in boys (but inherited from mother). Diagnosed by a blood test. There is an expanded dna segment called a trinucleotide repeat. This expanded dna segment is located on the x chromosome. ...Read moreSee 2 more doctor answers
Can be either: Genetic defects responsible for disorders can be on any chromosome. ...Read more
Chromosome defect: Patients with fragile x have a defective x chromosome. There are several variants, and not all cells may be affected. It is full disease only in males, but females can be carriers. It is a genetic disorder, but it often just occurs without warning. Affected boys can vary from normal to severe retardation and autism. There is no cure. ...Read more
What happens if a pedigree shows x linked recessive inheritance does it also show autosomal recessive inheritance?
No: X-linked recessive inheritance involves asymptomatic females passing a condition to their sons. An example is hemophilia A and B. Usually only males are affected. Autosomal recessive inheritance affects both sexes equally. Two asymptomatic parents can pass a condition to their children 25% of the time on average. ...Read more
Can chromosomal microarray detect down syndrome? What's the difference between chromosomal microarray and the conventional karyotypying?
It may, depends: First step is conventional karyotyping, if the clinical suspicion present for Down syndrome, detection of an extra chromosome 21, or triploidy, instead of two. In 95% of Down syndrome it's diagnostic, but If it didn't detect and suspicion still there - next step could be a microarray, which designed to detect submicroscopic abnormalities not detected by regular karyotyping for the rest of 5% D-se ...Read more
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- Chromosomal disorders
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- X and y chromosome
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- Fragile x chromosome
- X y chromosome chart
- List of human chromosomal disorders
- Chromosomal inversion disorders
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