Answer:
His sisters son
Explanation:
Mitochondrial DNA are small circular chromosomes found inside the mitochondria. They are passed exclusively from the mother to children through the egg cell therefore it is maternally inherited.
In the given question. Mitochondrial DNA of an extended family was sequenced and compared to a single male.
His sisters son will match because the person and the sister will have similar mitochondria since they have the same mother. The sister will pass it down to her son. 
 
        
             
        
        
        
The answer is b. is under purifying selection
        
             
        
        
        
Answer:
The mango a large tree native to India and Southeast Asia This tree is grown throughout tropical regions of the world for its delicious fleshy fruit containing a large seed-bearing pit
Explanation:
 
        
             
        
        
        
Answer:
The star sm0313, was discovered using the ANU skymapper telescope at the siding spring observatory and later confirmed by the megellan telescope in Chile. Somewhat surprisingly, it's located a "mere" 6,000 thousand light-years away, they origins date back to the beginning of time.