Petra Haak und Mc1R Person-Info 

( Ich bin Petra Haak)
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At last! The answer to why non-ginger guys have ginger beards – The...

www.thesun.co.uk
Scientist Petra Haak-Bloem explained it was down to a gene we all have called. MC1R. Hair colour is complex. Unlike other traits there is not ...

This is why some men have ginger beards | indy100www.indy100.com › news › why-people-have-ging...

www.indy100.com
· ... the amount of which determines hair colour, according to genetic scientist Petra Haak-Bloem. MC1R makes a protein called melanocortin 1, ...
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