Remember that although two divisions occur during meiosis , the DNA is replicated only once. For more detail, click on meiosis. The genetic makeup of and organism is its genotype. The genotype is a description of the genes an individual has for a particular trait. For a closer look, click on genotype.
Genetic changes occur when there is a change in the gentic code.
To see there different kinds of genetic changes and to find out how they occur, click on genetic changes.