Flashcards
Biology B1.1 D - The effects of genetic variants
Cards in this deck (10)
- 1What is a mutation?A change in the sequence of bases in DNA.
- 2What can cause mutations?Some substances (including substances in cigarette smoke), by ionising radiation, but mostly by errors when DNA is copied.
- 3What is point mutation?When a nucleotide is substituted for another.
- 4Why may point mutation not cause any effect?Because several different triplets can code for the same amino acid.
- 5What is insertion mutation?When an extra amino acid is added, changing the way the bases are divided into triplets.
- 6What is election mutation?When an amino acid is removed, changing the way the bases are divided into triplets.
- 7What happens when there is copying error when gametes are made?If the gamete is fertilised, every cell of the developing organism will have the variant.
- 8What are some effects of a mutation in offspring?They could be harmful, either causing diseases, or causing the embryo to die. Or they could help the organism to survive better.
- 9What happens if mutation happens in non-coding DNA?Gene expression could be affected.
- 10What is an example of a beneficial mutation?Opposable thumbs.
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- GCSE Biology (B1 - You & your genes) Flashcards on Biology B1.1 D - The effects of genetic variants, created by lily bevan on 02/12/2017.
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