Chromosome 21

But as a result of a mistake in cell division, some people have 3 copies of the 21st chromosome. There are supposed to be just 2.

But some people are born with an extra copy of the twenty-first chromosome.

The sequence of chromosome 21 was a turning point for the understanding of Down syndrome.

Of those genes on chromosome 21 that McLysaght has identified as being dosage-sensitive, many have already been linked to Down's syndrome.

Often, the error resulted in an extra copy of chromosome 21, which causes Down's syndrome.

The test is designed to detect abnormally elevated levels of chromosome 21.

Down syndrome (trisomy 21) is a disorder caused by the presence of an extra 21st chromosome.

But chromosome 21 carries 231 genes, including some that may well suppress cancer.

fish study of human oocytes failed to fertilize in vitro characterised with chromosome 21 aneuploidy

Cytogenetic analysis and phenotype location analysis on the karyotype of a ring chromosome 21 syndrome

Identification of chromosome 21 anomalies in patients with acute myeloid leukemia by fluorescence in situ hybridization

The hybridization signals of the probes were located near centromere on long arm of human chromosome 21;

Detection the Relation Between Chromosome 21 Missegregation and Age in Cytokinesis-blocked Female Lymphocytes by in situ Hybridization

Using the primed in situ labeling technique for a rapid detection of chromosome 21

Differential expression of 63 novel genes located on chromosome 3p21-22 in nasopharyngeal carcinoma

Use of primed in situ labeling technique in diagnosis of chromosome 21abnormality