Answer:
Dominant 
Explanation:
I'm pretty sure of this. C is dominant and that out weighs recessive.
 
        
                    
             
        
        
        
Genotype- gives your the genetic expression of an organism, while phenotype is the physical expression of an organism
        
             
        
        
        
Answer:
- Oxygen
- The body cells
- Producing energy
Explanation:
We breathe in oxygen from the external environment. Oxygen passes into our lungs and is passed into the blood capilaries.  Here it is carried to all the cells throughout the body. 
It diffuses into the cells and is necessary for the final stages of energy production by aerobic respiration. Therefore, it is necessary for powering all cellular processes. 
 
        
             
        
        
        
Answer:
Restriction endonuclease
Explanation:
It cut the DNA at specific sequence and it is very useful in biotechnology