AQA · Biology · 8461
GCSE Biology: Inherited disorders
Inheritance, variation and evolution · AQA GCSE Biology (8461), specification point 4.6.1.7. Cards are generated from the exam board's own specification for "Inherited disorders", and every card links back to the page it came from. Specification © AQA — used with attribution.
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What causes inherited disorders?
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The inheritance of certain alleles.
What is polydactyly?
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Having extra fingers or toes.
Is polydactyly caused by a dominant or recessive allele?
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A dominant allele — so only one copy is needed for the disorder to appear.
Which part of the cell is affected in cystic fibrosis?
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The cell membranes — cystic fibrosis is a disorder of cell membranes.
Is cystic fibrosis caused by a dominant or recessive allele?
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A recessive allele — two copies are needed for the disorder to appear.
Name two techniques that may alleviate suffering from inherited disorders.
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Embryo screening and gene therapy.
What three types of issue must be weighed when judging embryo screening?
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Economic, social and ethical issues.
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