Monday, 20 May 2013

3.31 understand that many mutations are harmful but some are neutral and a few are beneficial

A lot of mutations are harmful, like genetic diseases; cystic fibrosis.
Some don't change the chances of survival: like having a different colour hair.
There are a few mutations which are beneficial, for example a insect pollinated plant becoming brighter.


  1. I agree that even most of the mutations are not helpful, but some of the are indeed good, which is base of the research of the the gene knockin or knockdown

  2. Amazing notes on the IGCSE Biology spec. Thanks

  3. Most mutations actually don't do anything few are harmful and even fewer are beneficial

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