trisomy 21


Example Sentences

Recent Examples on the Web NIPTs are often quite good at identifying Down syndrome (trisomy 21) and Edwards syndrome (trisomy 18), especially for older parents who are more likely to have pregnancies affected by these conditions. Adriana Gallardo, ProPublica, 17 Dec. 2022 But Tennessee restricts abortions specifically on the basis of trisomy 21. Sarah Zhang, The Atlantic, 20 May 2022 Then all the cells of the resultant embryo have a missing or added chromosome, as in trisomy 21 (Down syndrome), where chromosome 21 has three chromosomes instead of a pair. Mark Cohen, Discover Magazine, 28 Aug. 2014 The congenital condition now known as trisomy 21 was previously called Down syndrome, a name chosen to replace the unacceptable term Mongolism. Helen Branswell, STAT, 28 Nov. 2022 These laws typically target Down syndrome, or trisomy 21, in which the presence of a third chromosome 21 can have a range of physical and mental effects, milder in some children than others. Sarah Zhang, The Atlantic, 20 May 2022 There are three types of Down syndrome: translocation, mosaicism and trisomy 21. Cnn Editorial Research, CNN, 28 May 2021 For example, having three copies of chromosome 21 (trisomy 21) is of clear clinical interest, because that leads to Down syndrome. Quanta Magazine, 8 Sep. 2021 In those with trisomy 21, the individual possesses a full extra copy of the chromosome. Cnn Editorial Research, CNN, 28 May 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trisomy 21.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


from the occurrence of trisomy in chromosome 21 of persons with Down syndrome

First Known Use

1961, in the meaning defined above

Time Traveler
The first known use of trisomy 21 was in 1961

Dictionary Entries Near trisomy 21

Cite this Entry

“Trisomy 21.” Dictionary, Merriam-Webster, Accessed 21 Mar. 2023.

Medical Definition

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