What factors are responsible for reduced penetrance?

[hivesaeed4]

I read that reduced/low penetrance occurs due to environmental and genetic factors. Could someone state such factors and if possible also provide examples.


Cheers!

 

[atyy]

Genetic
http://www.ncbi.nlm.nih.gov/books/NBK21850/
http://www.ncbi.nlm.nih.gov/books/NBK21804/
http://www.ncbi.nlm.nih.gov/books/NBK21774/

Environmental:
http://www.ncbi.nlm.nih.gov/pubmed/12724221
http://www.ncbi.nlm.nih.gov/pubmed/19680444