Mitosis is the process of multiplying, (replication) of chromosomes. So when this happens, one cell will split into two of the exact same identical cells. 
        
             
        
        
        
The correct answer is sex linkage.  
Sex linkage refers to the phenotypic expression of an allele, which relies upon the gender of an individual and is directly associated with the sex chromosomes. These genes are regarded sex-linked as their expression and patterns of inheritance vary between the males and females. The sex linkage cannot be the same as genetic linkage, the sex-linked genes can be associated genetically.  
 
        
                    
             
        
        
        
Answer:
Option B
Explanation:
Water soluble hormones associate with the G protein of cAMP. This G protein is intra-cellular i.e found inside the cell.  
However in case of lipid derived hormones, the hormone has to diffuse through the cell across the plasma membrane to bind to DNA or the intra-cellular receptors.This regulates the gene transcription and induces protein production that affects the cell functioning for a long time. 
Hence, option B is correct
 
        
             
        
        
        
The answer is B. Cross-pollination occurs when pollen fertilizes female egg cells on the same flower.
        
                    
             
        
        
        
A. The mutation that occurs during meiosis is a sure way of gene splitting I presume:)