Answer:
Zygote 
Explanation:
As a result of meiosis in the male and female sex organs of a plant, male and female gametes or male and female sex cells produced respectively. Gametes are universally haploid.  Male and female gametes fuse or fertilize to form a diploid zygote. A zygote or fertilised egg is a one-celled structure which later develops into an embryo. 
 
        
                    
             
        
        
        
Cell wall.......... Hope it helps, Have a nice day :)
        
                    
             
        
        
        
Hello!
I believe the correct answer to your question would be sister chromatids.
Hope this helps, and have a lovely rest of your day :)