B1 Revision Quiz

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1. What causes the development of testes?

  • A gene called androgens is in the embryo whihc causes the development of testes
  • The gene SRY causes androgens to be made which causes the development of testes
  • No proteins are produced so testes are developed
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2. What is a phenotype?

  • A phenotype is all the genes an organism displays
  • A phenotype is all the genes an organism has
  • A phenotype is a code for making certain proteins

3. What is a gene?

  • A gene is the characteristics an organism displays
  • A gene is a code for making certain proteins
  • A gene is everything an organism displays

4. What can adult stem cells be used for?

  • to treat blood diseases, maintaining and repairing old, damaged tissues, leukaemia
  • replacing faulty heart muscle cells, insulin producing cells for diabetes and nerve cells fro paralysed people

5. What is a false positive?

  • This is when a genetic test has wrongly detected a certain allele or a faulty chromosome so the person thinks that they have a genetic disorder when they don't
  • This is when the test has failed to detect a certain allele or faulty chromosome so the person thinks that they do not have a genetic disorder when they do

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