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 correct spelling is 'trisomy'. In genetics, trisomy is the condition in which a cell contains three copies of a particular chromosome instead of the normal pair, as in trisomy 21, which causes Down syndrome. The word is formed from the prefix 'tri', meaning three, and the Greek root 'soma', meaning body, and it therefore contains a single letter 's' followed by the ending 'my'. The other options are wrong because 'Trisomie' and 'Trissomie' use a French style ending, while 'Trissomy' and 'Trissomie' wrongly double the letter 's'. Hence 'Trisomy' is correct.

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

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