“Trisomy 21.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trisomy%2021. Accessed 21 Jan. 2025. Copy Citation Share Post the Definition of trisomy 21 to Facebook Facebook Share the Definition of trisomy 21 on Twitter Twitter Medical...
Define Trisomy-21. Trisomy-21 synonyms, Trisomy-21 pronunciation, Trisomy-21 translation, English dictionary definition of Trisomy-21. or Down's syndrome n. A congenital disorder caused by the presence of an extra 21st chromosome and marked usually by mo
trisomy 21 See More Nearby Entries Cite this Entry Style “Trisomy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trisomy. Accessed 30 Jan. 2025. Copy Citation Share Post the Definition of trisomy to Facebook Facebook Share the Definition ...
1.Of the nature of trismus. 2.A form of trismus nascentium; once thought to be due to pressure on the occiput during delivery. Medical Dictionary, © 2009 Farlex and Partners Want to thank TFD for its existence?Tell a friend about us, add a link to this page, or visitthe webmaster...
A common example is trisomy 21 also referred to as Down syndrome, which is due to the presence of an extra chromosome 21. Each child is supposed to get a single copy of each of the chromosomes that make their DNA from mom and dad, however in Down syndrome a child gets an extra ...
For this reason, the existence of three such chromosomes is sometimes referred to as trisomy 21. In a very rare number of Down syndrome cases (about 1-2%), the original egg and sperm cells are completely normal. The problem occurs sometime shortly after fertilization; during the phase where...
Some examples of chromosomal diseases include trisomy 21, also known as Down's Syndrome. Another chromosomal disorder is Turner's Syndrome, a sex linked disorder where an X chromosome is missing. A third type, where extra chromosomal material is present on the number 12 chromosome is called Pall...
Every human cell contains the exact same set of chromosomes. Down syndrome— The most prevalent of a class of genetic defects known as trisomies, in which cells contain three copies of certain chromosomes rather than the usual two. Down syndrome, or trisomy 21, usually results from three ...
Down syndrome is usually caused by complete trisomy 21. Rarely, it is due to partial trisomy of the segment 21q22. We report on a 33-month-old girl with tetrasomy 21 pter → q22.1 resulting from an extra chromosome idic(21)(q22.1). She has craniofacial traits typical of Down syndrome,...
Centric-fusion translocations are relatively common. In balanced form, they take the place of two acrocentric chromosomes and result in no problems. But in unbalanced form, centric-fusion translocations account for some cases of the trisomy 13 (Patau) syndrome and trisomy 21 (Down) syndrome. ...