GlossaryAutonomous chromosomes: Chromosomes contain DNA within an individual. The normal human genetic makeup is made up of 23 pairs of autosomes and 1 pair of sex chromosomes. Recessive gene: A recessive gene is a defective copy that does not have any effect unless it is paired with another defective copy on the other chromosome. Pyrexia: This is a medical term for fever.Dystonia: This indicates muscle contractions that are involuntary and have an effect on the posture as well as cause slow movements. Published on Apr 21, 2015Last Updated on Apr 22, 2015