Japanese researchers have confirmed the second case known to science of a chimpanzee born with trisomy 22, a chromosomal defect similar to that of Down syndrome (or trisomy 21) in humans. The report1 ...

During the year 1966, 7 infants with the D-trisomy syndrome presented at Los Angeles County General Hospital and thus afforded the opportunity to investigate the hemoglobin characteristics in a rather ...

Mosaic Down syndrome is a rare form of Down syndrome. People with mosaic Down syndrome only show extra chromosomes in some cells, as opposed to all their cells. Human DNA typically contains 23 pairs ...

Among 19 autopsied cases of 17–18 trisomy syndrome, 10 confirmed by cytogenetic studies, nine diagnosed on the basis of phenotypic characteristics, seven cases of neonatal hepatitis were found, ...

Changes in either chromosome structure or number can occur during cell division. Each human has 46 chromosomes, 22 pairs of autosomes and 1 pair of sex chromosomes (XX: female or XY: male). During ...