Doctor insights on:
What Sort Of Disease Is A Chromosomal Abnormality
Biological inheritan: Most forms of albinism are the result of the biological inheritance of genetically recessive alleles (genes) passed from both parents of an individual, though some rare forms are inherited from only one parent. There are other genetic mutations which are proven to be associated with albinism. All alterations, however, lead to changes in melanin production in the body. ...Read more
Help! is multiple sclerosis a result of single or multiple gene disorder or a chromosomal abnormality?
Not genetic mostly: There are no signs that multiple sclerosis is a sign of a chromosome disorder. Although there is likely a genetic component, this appears to be a very small role. This is not the type of disease where if you have the gene, you get the disease. It tends to be sporadic. It is an auto-immune disease where antibodies attack the white matter of the brain and/or spinal cord. ...Read moreSee 1 more doctor answer
Generally speaking..: Chromosomal disorders are disorders of entire chromosomes. Remember, we have 23 pairs of chromosomes for 46 total. Downs syndrome is a 3rd copy of chromosome #21 in its entirety. A single gene disorder would be disorders like sickle cell, cystic fibrosis or thalessemia. In which the chromosome looks and is normal, but the gene at that site on the specific chromosome is specific to the disease. ...Read more
Bad news: This material is the library of information the fetus needs to develop organs and metabolic systems.Too much or too little means something will go wrong. Since many defects are relatively unique, the outcome may or may not be predictable. Some will trigger spontaneous miscarriage. Some are born and live a long life but have many problems along the way. ...Read moreSee 1 more doctor answer
Down syndrome.: The most common chromosomal abnormality in a newborn population was trisomy 21 (down), with an incidence of 1 in 730 live births. Abnormalities of the sex chromosomes (eg, monosomy x or turner, xxy, xyy, xxx) and structural balanced rearrangements also occurred frequently. Trisomy 16 is the most common aneuploidy in abortuses. Trisomy 18 (edwards), and 13 (patau) are most common in stillborns. ...Read more
Size.: Mutations are strategically placed minute changes in dna that change the message encoded in it to produce abnormal proteins and pathological symptoms. Chromosomal abnormalities (e.g. Down syndrome), are larger changes in the number of dna packages (chromosomes) each cell carries, so that many organ systems malfunction (brain, heart, bone marrow, etc). ...Read more
Is it true that the chances of having a child with a chromosomal abnormality increases as a womans age increases over 40 year?
Yes: It actually increases to a small degree with every year after peak fertility in the mid 20's. At 40 the risk of a trisomy 21 down syndrome reaches 1% while at 45 it reaches 2%. This number is added to the random risk of 4% that any pregnancy has of an unexpected event (cleft palate, premi, other defect). ...Read more
1in 1000: According to the national institute of health. ...Read more
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