The process by which the number of chromosomes is reduced by half as sex cells form.
Female egg and male sperm join to create a new organism that had half chromosomes from female and half from male.
One parent produces a new organism identical to itself.
Any change in the DNA of a gene or chromosome.
A disease in which cells grow and divide un controllably, damaging the parts of the body around them.
A mass of abnormal calls that develop when cells divide and grow uncontrollably.
The use of drugs to treat a disease.