Search results
Results from the WOW.Com Content Network
In genetics, chromosome translocation is a phenomenon that results in unusual rearrangement of chromosomes. This includes balanced and unbalanced translocation, with two main types: reciprocal, and Robertsonian translocation. Reciprocal translocation is a chromosome abnormality caused by exchange of parts between non-homologous chromosomes. Two ...
t(11;14) is a chromosomal translocation which essentially always involves the immunoglobulin heavy locus, also known as IGH in the q32 region of chromosome 14, as well as cyclin D1 which is located in the q13 of chromosome 11 . [2] Specifically, the translocation is at t(11;14)(q13;q32). [3] [4]
This chromosome contains a balanced translocation between the q arm around band 24.13 of chromosome 8 and the q arm around band 11.1 of chromosome 22. Carriers of it are at risk of having progeny with the Der(22)t(8;22)(q24.1;q11.1) syndrome because they acquired a sSMC that has alteration(s) in the parent's abnormal chromosome.
CML was the first cancer to be linked to a clear genetic abnormality, the chromosomal translocation known as the Philadelphia chromosome. This chromosomal abnormality is so named because it was first discovered and described in 1960 by two scientists from Philadelphia, Pennsylvania , US: Peter Nowell of the University of Pennsylvania and David ...
A variant of this, a three-way translocation, t(8;14;18), has also been identified. [13] Another variant is t(2;8)(p12;q24). [14] This involves the myc oncogene being translocated from chromosome 8 to the Ig kappa locus on chromosome 2. This type of translocation is seen in 15% of cases of Burkitt lymphoma. A rare variant is t(8;22)(q24;q11). [14]
If it happens to strike a chromosome, it can break the chromosome, result in an abnormal number of chromosomes, inactivate one or more genes in the part of the chromosome that it hit, delete parts of the DNA sequence, cause chromosome translocations, or cause other types of chromosome abnormalities. [74]
Disorders such as chromosome instability can be inherited via genes, or acquired later in life due to environmental exposure. One way that Chromosome Instability can be acquired is by exposure to ionizing radiation. [14] Radiation is known to cause DNA damage, which can cause errors in cell replication, which may result in chromosomal instability.
A karyotype of an individual with trisomy 21, showing three copies of chromosome 21. An abnormal number of chromosomes is known as aneuploidy, and occurs when an individual is either missing a chromosome from a pair (resulting in monosomy) or has more than two chromosomes of a pair (trisomy, tetrasomy, etc.).