Changes

Our bodies are made up of about 100 trillion cells, each of which is responsible for a specific function. The thousands of different proteins in the cells work together like a machine to make the [[cell]] function as it should. If the genes are normal, the body part will function well. If a change (mutation) has happened in a gene, the protein may be faulty, as for example in sickle cell anemia where the instructions for making [[blood]] cells are abnormal.

Our bodies are made up of about 100 trillion cells, each of which is responsible for a specific function. The thousands of different proteins in the cells work together like a machine to make the [[cell]] function as it should. If the genes are normal, the body part will function well. If a change (mutation) has happened in a gene, the protein may be faulty, as for example in sickle cell anemia where the instructions for making [[blood]] cells are abnormal.

In 2005 it was shown that genes were not the only way that genetic information could be inherited. Scientists working at Purdue University discovered that Arabidopsis plants could remember what genes they had in the past, and correct mistakes in their current genes. This non-mendelian inheritance probably involves a RNA cache of past messenger RNA transcripts.<ref>[http://www.ncbi.nlm.nih.gov/pubmed/15785770?ordinalpos=15&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum 2005 study]</ref>

In 2005 it was shown that genes were not the only way that genetic information could be inherited. Scientists working at Purdue University discovered that Arabidopsis plants could remember what genes they had in the past, and correct mistakes in their current genes. This non-mendelian inheritance probably involves a RNA cache of past messenger RNA transcripts.<ref>[https://www.ncbi.nlm.nih.gov/pubmed/15785770?ordinalpos=15&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum 2005 study]</ref>

==Mutation==

==Mutation==