The BBC West region started on 1st September 1957 as part of the BBC Television Service, before becoming BBC One West.

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The Secret Life of Twins

Helen Williamson

Tina Fletcher

The Secret Life of Twins: Episode 2

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Episode 2

BBC One - The Secret Life of Twins, Episode 2

How twins are helping scientists to explore the possible genetic basis of sexuality.

How the differences between identical twins can help science understand what makes us all who we are, including the possible genetic basis of sexuality.

The second programme in this two-part series focuses on how the differences between identical twins can help science understand what makes us all who we are. 

Through these personal stories we look at aspects of health and lifestyle that affect us all, obesity, ageing and the fight against killer diseases including cancer. We meet identical twins Mark and John who are helping scientists to explore the possible genetic basis of sexuality, they may be genetic clones but John is gay and Mark straight - they want to understand what makes them different.

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BBC One is a TV channel that started broadcasting on the 20th April 1964. It replaced BBC Television.

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Two-part series that looks at some of the most fascinating identical twins in the world.

The BBC South West region started on 20th April 1961 as part of the BBC Television Service, before becoming BBC One South West.

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The BBC South region started on 5th January 1961 as part of the BBC Television Service, before becoming BBC One South.

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The BBC East region started on 1st May 1959 as part of the BBC Television Service, before becoming BBC One East.

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The BBC North East & Cumbria region started in 1959 (tbc) as part of the BBC Television Service, before becoming BBC One North East & Cumbria.

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Formerly part of a wider BBC One South East region that included London and part of the South region. Separated from BBC One London 2001-09-03 following reorganisation of the South East region.

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BBC Northern Ireland region started on 19th April 1955 as part of the BBC Television Service, before becoming BBC One Northern Ireland.

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The Secret Life of Twins

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