Factors Affecting Variety in a Species

Chapter 8

Click on a number in the grid to see the clue or clues for that number.
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter.

1            2          
3      4                
   5                 
                  
                  
   6              7     
                  
8                    
                  
  9             10       
                  
   11        12           
                  
                  
     13               
                  
         14           
    15                
                  
                  
    16                

Across:

3. Female sex cell (3)
5. Sex chromosome found in human males and females (1,10)
6. Structure present in anthers that contains male sex cells of a flowering plant (6,5)
8. Production of different combinations of matching pairs of chromosomes by 'shuffling' during meiosis (6,10)
9. Organic compound made of amino acids (7)
10. Male sex cell in animals (5)
11. Molecular language determined by the sequence of bases in a DNA chain (7,4)
13. Molecular component of protein (5,4)
14. Site of egg production (5)
15. Site of sperm production in animals ((6)
16. Fertilised egg (6)

Down:

1. Process by which an offspring of either one sex or the other is formed (3, 13)
2. Molecular component of a DNA chain (4)
4. Sex chromosome found in human males only (1,10)
7. Part of a flowering plant containing pollen grains (6)
12. Thread-like structure found inside the nucleus of a cell (10)