Answer;
a segment of chromosomal DNA
Explanation;
A gene is a  hereditary unit consisting of a sequence of DNA that occupies a specific location on a chromosome and determines a particular characteristic in an organism. Genes undergo mutation when their DNA sequence changes.
It is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins.  However, many genes do not code for proteins.
Alleles are forms of the same gene with small differences in their sequence of DNA bases. These small differences contribute to each person’s unique physical features.
 
        
                    
             
        
        
        
Yes i agree, because these laws were written to be withheld by all people of the world, and without them we wouldn't be who we are today. (can i have a brainliest answer please
        
             
        
        
        
Carl Von Linneaus developed the system for classifying organisms.
        
                    
             
        
        
        
The answer to this is false, a vector is a disease usually spread from a bite.