Answer: The genetic material must be a DNA double helix. 
Explanation:
Genetic material is the material which resides in the nucleus or any other organelles within the cell which is responsible for development of traits in an organism. It is a hereditary material which passes from parents to their offsprings. It is not necessary the genetic material must be stored in the form of double stranded DNA instead it can be stored in the form of RNA which is single stranded genetic material it directly encodes for proteins during translation. 
 
        
             
        
        
        
Hypothesis.
A Hypothesis is an estimation of what might happen and the student's observation before moving on to investigate.
        
             
        
        
        
Isotopes
The answer has to be 20 characters long so this is irrelevant.
        
                    
             
        
        
        
A fertilized egg splitting into two embryoa
        
                    
             
        
        
        
A person who has been arrested for robbery should be referred to as the suspect.