I think that the answer is family
        
             
        
        
        
Answer:
infectious disease is a disease that can be spread from one person to another  by the means of touching,kissing,coughing,sneezing ect ect.
but non infectious diseases r diseases that don not spread from one person to another. for eg: cancer bla bla bla.
please mark me as brainlist as i have written this from my own head and also i have science exam on tuesday
PEACE OUT
 
        
                    
             
        
        
        
Lets say that the genotypes are:
Male affected:XbY
Male unaffected: XaY
Female  affected: XbXb
Female carrier: XaXb
Female unaffected:XaXa
P: XbY  x  XaXa
F1: XaXb  XaXb  XaY  XaY The middle square is female carrier.
P:XbY  x  XaXb
F1: XaXb  XbXb  XaY  XbY The left square is affected female.
P:XaY  x  XbXb
F1: XaXb  XaXb  XbY  XbY The right square is affected male.
 
        
             
        
        
        
Gravitational potential energy
 
        
             
        
        
        
Answer:
Well...
Explanation:First of all skin color is determined by how much melanin you have and the one thing that would show more variability in the human population is probably the one that uses less genes, because of how we come from only two genes which makes us different.