Sounds like infectious would fit. 
        
             
        
        
        
I think the answer is frequency if I remember correctly
        
             
        
        
        
Answer:
The DNA of the baby shares the DNA of both father and mother, and hence a cross link between an O type mother (Taylor) and an AB type father (Tyler) will produce children with blood groups A and B. It will be impossible to give birth to a child with blood group O. 
 
        
             
        
        
        
Answer:
Explanation:
Scientific theory: a well established, highly reliable explanation
Scientific hypothesis: makes predictions of future events/ 
Both: based on observations of natural phenomenons/ can be tested by many researchers