A condition in which an extra copy of a chromosome is present in the cell nuclei, causing developmental abnormalities.
- The aneuploid embryos detected in the progeny from this cross include trisomies and UPDs of chromosomes 7 and 18.
- Both monosomy and trisomy of specific chromosomes are associated with developmental defects and cancer risk.
- A common type of chromosomal abnormality is called a trisomy.
noun[mass noun] Medicine
The most common form of Down’s syndrome, caused by an extra copy of chromosome number 21.
- Microcephaly can also be caused by the chromosomal disorder, trisomy-21 Down syndrome, and by environmental factors, such as fetal alcohol syndrome and fetal exposure to radiation before 15 weeks gestation.
- Trisomy 21 can be detected in the first few months of pregnancy by amniocentesis.
- The majority (about 94%) of children with Down Syndrome are born with standard Trisomy 21, which is not hereditary.
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.