Homework help!

Mitosis  Cells that contribute to general body growth and development must be like their parents to assure consistent body function -- skin produces skin, bone produces bone, etc.  This consistency requires maintenance of precise chromosome numbers.  The process can be illustrated with this equation, in which the original number of chromosomes is called 2n (twice the number of pairs).  Solve:
                           
                            2n  x  2   2  =  ______

Returning to the roommate analogy, what has happened to the directory (2n)?


Meiosis  Cells that will be used for sexual reproduction (sperm and ova),  on the other hand, must not have the same chromosome number as their parents.  What would happen to the chromosome count in a fertilized ovum if both sex cells had contained the customary number of chromosomes?


Specifically, each sex cell must contain only half the usual number of chromosomes.  To illustrate, solve this equation:
                           
                            2n  x  2    2    2  =  ______

In the roommate analogy, what has happened to the directory?