English Grammar - Spelling

English Grammar
English Grammar - Spelling

Spot the correct spelling of a chromosomal 'three copies' term.


Options:

  1. Trisomie
  2. Trissomy
  3. Trisomy
  4. Trissomie

Right Answer: Trisomy

The condition in which a cell carries three copies of a particular chromosome instead of the usual two is called trisomy, the best known example being trisomy 21 or Down syndrome. The word is built from the Greek 'tri' meaning three and 'soma' meaning body, giving a single s and a final y. The correct spelling is therefore 'Trisomy', the third option. The other choices each distort it: 'Trisomie' and 'Trissomie' use a French-style ending, while 'Trissomy' and 'Trissomie' wrongly double the letter s. Hence the correct spelling is Trisomy.

This question is part of English Grammar - Spelling, which has 13 practice questions with answers.

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