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Ectrodactyly

Photograph of the hands of someone with only four digits on their right handEctrodactyly is a condition in which children are born with claw-shaped hands and/or feet due to their being born with missing digits. It is sometimes referred to as ‘lobster claw syndrome.’ The image at left is of a family sharing this genetic condition. It appears to have been taken in Spain in 1930.

Photograph of members of the Vadoma Tribe from Zimbabwe, seated with their clawed feet facing the cameraWhen I was much younger, I read of a tribe in Zimbabwe, Africa where about 1/4 of the population had this condition.  I remember how their condition intrigued me even then.  Because it was against tribal law for people to marry outside the tribe, many of  the Vadoma people had ectrodactyly. You may read a little more about them here.

You may read more about ectrodactyly in this Wikipedia article or simply search for more information using Google.

 

 

Brilliant!!! This helps so much!!! So much easier than anything else I have found. This is now simple.
Thanks again for showing the simple way of doing this. I look forward to the next video!! Absolutely brilliant.
Once again, excellent! I’ve watched many others, that have not helped nearly as much as these. Thanks for making it so easy to understand. When things get complicated, it is easy to make a mistake, but your method of writing down the structure helps to prevent mistakes.
Thanks a million!!! I’ve watched many videos and read tutorials, but still could not get two in a row correct on Khan Academy. Your explanation was so clear and simple that it finally made sense to me and now I can get all of the problems correct!!! Thank you very much.
It all makes total sense now! Thanks very much for all the derivative videos!!! Very helpful.
MemorizeAndLearn (on four different CCM YouTube videos about Differentiation)

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