Multiple choice

Which of the terms is LEAST related to the others

  1. fragile X syndrome

  2. X inactivation

  3. tortoise-shell coat pattern in cats

  4. Barr body
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A Correct answer
Explanation

X inactivation, tortoise-shell coat patterns, and Barr bodies are all phenomena related to the dosage compensation mechanism in mammals. Fragile X syndrome is a genetic disorder caused by a mutation in the FMR1 gene, which is distinct from the regulatory mechanism of X inactivation.

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