Answer:
B
Explanation:
Its 23 in mitosis cell division 
 
        
             
        
        
        
The function of a protein is determined by its shape. The shape of a protein is determined by its primary structure (sequence of amino acids). The sequence of amino acids in a protein is determined by the sequence of nucleotides in the gene (DNA) encoding it.
 
        
             
        
        
        
Chemical composition and physical properties
        
             
        
        
        
The answer is a half-filled circle. 
In the pedigree charts, squares present males and circles present females. If a female is healthy, the circle is empty (white). If a female is affected with a trait, the circle is filled-in (usually black). However, if a female is a carrier of a disease, which means that one allele is dominant and one is recessive, then the circle is half-filled. 
        
                    
             
        
        
        
Anaphase 1. It’s also the only answer where the chromosomes themselves separate.