The answer to this given question is the letter "C". The basis of immunoassay is the unknown amount of drug in a sample competes with the known amount os fluorescently labeled drug for binding to an antibody to that drug.
        
             
        
        
        
Genetic defects can be cause by any chromosome, whether an autosome or a sex chromosome.
        
             
        
        
        
Prophase 1, where crossing over occurs and DNA is already replicated
        
             
        
        
        
Answer:
George Washington is the first president