What Are 'Twin Studies'?


Listening — Advanced Level
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Watch the video and answer the questions

  1. These identical twins share the same   .

  2. They are genetically   .

  3. Non-identical twins derive from two different sperms and two different   .

  4. They all share the same   as they grow up in the same family.

  5. Data is gathered from   pairs of twins.

  6. Identical twins share   their genes.

  7. If both identical and non-identical twins resemble each other closely, this must be due to shared environmental   .

  8. Twin studies can provide clues to the relative importance of   and environment.


Practice your writing skills by discussing the questions below

  1. How are identical and non-identical twins similar and/or different?

  2. Do you know of anyone who has a twin? Are they identical or non-identical?


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