Homologous chromosomes contain the same genes and the same locations, or loci but may have different alleles. But jsut so this definition makes sense, lets define some of the words. 
A gene contains the traits that is passed down from two parents to its offspring. An allele is one part of a pair of genes that are located in a particular spot that controls the same trait.
        
             
        
        
        
It is called Acidosis or respiratory acidosis 
Hope this helps 
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- Extracorporeal 
Happy studying!