Question

What disorders are caused from too many or too few sexchromosomes?

Answer 1

Error in the number of chromosomes (too many or too few) includes the following disorders: Down's syndrome or trisomy 21: The individual has an extra chromosome 21. Trisomy 18 or Edwards's syndrome: The individual has an extra chromosome 18. Trisomy 13 or Patau syndrome: The individual has an extra chromosome 13.