Final answer:
The normal function of the frataxin gene on chromosome 9 is to produce the frataxin protein, which is involved in cellular energy production and iron-sulfur cluster synthesis. Defects in the frataxin gene can lead to the rare genetic disorder Friedreich's ataxia.
Step-by-step explanation:
The normal function of the frataxin gene on chromosome 9 is to produce the frataxin protein. This protein plays a crucial role in cellular energy production by assisting in the synthesis of iron-sulfur clusters. Iron-sulfur clusters are necessary for the proper function of enzymes involved in energy metabolism, DNA repair, and other cellular processes.
Defects in the frataxin gene can lead to a rare genetic disorder called Friedreich's ataxia. In individuals with Friedreich's ataxia, the frataxin protein is either absent or produced in very low amounts. This results in impaired iron-sulfur cluster formation, leading to progressive damage to the nervous system and other organs.
Understanding the normal function of the frataxin gene is important for studying Friedreich's ataxia and developing potential treatments.