A Genetic cross also cross breeding is the deliberate breeding of two different individuals that results to offspring that carry part the genetic material of each parent. A monohybrid  cross is the breeding of two organisms that differ in a single trait.  A hybrid is an offspring from a cross between parents and has different phenotypes for a specific trait. 
        
                    
             
        
        
        
Oh thats pretty simple that is a gastroenterologist
 
        
             
        
        
        
Answer:
Like DNA, RNA is made up of nucleotides. ... There are two differences that distinguish DNA from RNA: (a) RNA contains the sugar ribose, while DNA contains the slightly different sugar deoxyribose (a type of ribose that lacks one oxygen atom), and (b) RNA has the nucleobase uracil while DNA contains thymine.