Ko te rerekē haere o ngā ira o tētahi rauropi. Ko te nuinga o ngā irakē ka hua noa mai i te kukuwhatanga o tētahi momo i te takanga o te wā. Arā, ka itiiti haere ngā ira ngoikore, ā, ka maha haere ngā ira pakari. I ētahi wā ruarua noa iho, he mate ira ka hua ake i te tukanga irakē.
Changes to the genetic material of an organism. Most mutations occur as a natural process in the evolution of a species where weaker genes are reduced and stronger genes are accumulated. In a small number of cases, a mutation gives rise to a genetic disorder.
ira - gene
kē - different, of another kind