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8 Cards in this Set
- Front
- Back
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Variation can either be... |
Genetic Environmental |
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Genetic variation with species is caused by... |
Organisms having different alleles (which can lead to different phenotypes) |
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Sexual reproduction also causes genetic variation since... |
It results in alleles being combined in many different ways in the offspring |
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Example of variation due to the environment |
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Mutations are... |
Changes to the base sequence of DNA |
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When mutations occur in a gene, it results in an... |
Alllele, or different version of the gene |
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Very rarely, a singlemutation can have a big effect on phenotype. E.g.. |
Might result it production of protein that is so different it can no longer carry out it's function. (This is what happens in CF) |
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What mutation occurs in CF? |
A mutation causes a protein that controls the movement of salt and water into and out of cells to stop working properly. This leads to the production of thick, sticky mucus in the lungs and digestive system, which can make it difficult to breathe and digest food. |
