Which code describes position 12 on the long arm of chromosome 13?

1. The code begins with the chromosome number, which here is 13. 2. Next comes the arm letter, where p marks the short arm and q the long arm. 3. The long arm is wanted, so the letter is q. 4. Last comes the subdivision number along that arm, which is 12. 5. Assembling the parts in order gives 13q12. 6. Writing 13p12 would place the position on the short arm, and starting with 12 would name the wrong chromosome. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 13 "Modern Understandings of Inheritance", review questions_