Variation
Subject:
Biology [1]
Variation A mutation can be defined as a change in the type of the amount of DNA, which arises from: Mistakes in the copying of DNA during, or just before, cell division occurs ? for example, the wrong bases become paired up Damage to the DNA ? some environmental conditions can alter the sequencing of DNA (radioactive materials ? mutagens, such as carcinogens, which cause cancer) Uneven distribution of chromosomes during the division of cells and then fertilisation following on from this and, therefore, carrying the trait or the defect forward