I would say <span>The trait is carried either on the X or the Y chromosome</span>
        
             
        
        
        
Answer:
O
Explanation:
the speed of the revolutions of the Moon and Earth around the Sun
 
        
             
        
        
        
The cooling of earth’s surface and the heating of earths core
        
             
        
        
        
1. Two genetically identical copies of DNA 
2. Finds an error in DNA, removes the incorrect nucleotide and replaces it with a correct one.
3. It is used as a copy/ "template" for replication in order to have two identical copies of DNA.
4. DNA helicase unwinds DNA double helix and Topiosomerase ensure there isn't too much unwinding.
5. Replication has a built on proofreading system - DNA polymerase removes the incorrect nucleotide and replaces it with a correct one.
        
             
        
        
        
Answer: independent variable
Explanation: