The process that produces sex cells is _____.

Each chromosome contains two identical _____.

In the _____ division of meiosis, chromosome pairs line up and then separate.

In the _____ division of meiosis, chromosomes split.

The use of chemical substances to treat a disease is called _____.

A mutation can be passed to offspring only if it takes place in a(n) _____ cell.

A mutation is any change in the _____ of a gene or chromosome.

Cancer is treated with surgery, _____, and drugs that destroy the cancer cells.

A mutation can occur if a base pair is _____, deleted, or substituted for another.

True or False: Mutations are sometimes helpful to the organism.

True or False: Cancer is a disease in which cells divide slowly.

True or False: If chromosomes do not separate correctly during the formation of sex cells, the organism that forms can end up with too many or too few chromosomes.

True or False: Cancer causes the growth of tumors.

True or False: Scientists think that cancer begins when something damages a cell’s proteins.