London, England is at (Greenwich Mean Time) GMT. Perth, Australia is (Greenwich Mean Time) GMT +8 hours, ie. 8 hours ahead of Greenwich, England. Perth is 8 hours ahead oâ¦f London. During the Northern Hemisphere summer, London, England is at (British Summer Time) BST. Perth Australia is (British Summer Time) BST +7 hours. Perth is 7 hours ahead of London during the Northern Hemisphere summer.
Answered by The WikiAnswersÂ® Community. Making the world better, one answer at a time. A change in the nucleotide sequence of DNA is called a mutation. A change in the nucleotide sequence of DNA is called a <b>mutation</b>.
Gene changes within cells (mutations). Normally genes make sure that cells grow and reproduce in an orderly and controlled way. They make sure that more cells are produced as they are needed to keep the body healthy. Sometimes a change happens in the genes when a cell divides. The change is called a mutation. It means that a gene has been damaged or lost or copied twice. Mutations can happen by chance when a cell is dividing. Some mutations mean that the cell no longer understands its instructions and starts to grow out of control.