Any ideas on tongue-rolling, ear-lobes etc?

Ian Russell ian at
Tue Oct 15 04:48:34 EST 1996

I am a designer of interactive science exhibits, currently working on a
computer-based activity that compares visitors individual

In order to provide more background information, it would be a great
help if I knew more about the genetic basis of the following features :

Tongue-rolling (can or can not)
Ear-lobes (present or absent)
Arm-folding (which hand on top)
Hand-clasping (which thumb on top)
Hair-type (straight, wavy, curly)

Can anybody comment, please?

Ian Russell  INTERACTIVE SCIENCE LTD, UK     ian at

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