Abnormalities in Biological Definition

X chromosome

... 1 Function 2 Role in disease 2.1 Numerical abnormalities 2.2 Other conditions 3 References Function The sex ... active that was previously supposed. Role in disease Numerical abnormalities Klinefelter syndrome : Klinefelter syndrome is caused by the ...

Chromosome

... regions have been left undetermined, as have a small number of unclonable gaps. [1] Chromosomal aberrations Some chromosome abnormalities do not cause disease in carriers, such as translocations , or chromosomal inversions , although it may lead to a higher chance of having a child ...

Computed axial tomography

... dissection , and requires accurately timed rapid injections of contrast and high-speed helical scanners. CT is the standard method of evaluating abnormalities seen on chest X-ray and of following findings of uncertain acute significance. Abdominal and pelvic CT Many abdominal disease processes ...

Down syndrome

... baby with the syndrome. At age 20-24, it is only 1/1490, while at age 40 it is 1/106 and at age 49 it is 1/11. (Source: Hook EB. Rates of chromosomal abnormalities at different maternal ages. Obstet Gynecol 1981;58:282.) Genetic counseling and genetic testing such as amniocentesis are usually offered for ...

Edward's syndrome

... their body contains extra information, its ability to grow and develop appropriately is delayed or confused. This results in characteristic physical abnormalities such as low birth weight ; a small, abnormally shaped head; small jaw; small mouth; low-set ears; and clenched fists with overlapping fingers. Those ...

Stem cell

... of miscarriages, developing more effective techniques of contraception, or developing methods for detecting the presence of gene or chromosome abnormalities in embryos before implantation, increasing knowledge about the development of embryos; increasing knowledge about serious disease, or ...