From the professional dancers point of view i can say, that the level of pain tolerance can be trained, what is very common within performing artists. The fear of being not able to perform, loosing the job, loosing a leading role, let many dancers to ignore the pain, what is basicly a protection mechanism of our brain. Trained high level of pain tolerance can lead often to heavy dance injuries. The dancers train themselves not to feel the pain anymore, however the level of pain tolerance depends on each individual dancer.
Concerning the genetic determinate pain perception: It exit several literature and evidences about genes and pain reception: Hereby some;
Trends Genet. 2007 Dec;23(12):605-13. Epub 2007 Nov 26.
Genetic architecture of human pain perception.
Diatchenko L1, Nackley AG, Tchivileva IE, Shabalina SA, Maixner W.
Br J Pain. 2013 Nov;7(4):171-8. doi: 10.1177/2049463713506408.
Human pain and genetics: some basics.
James S1.
Eur J Neurosci. 2014 Feb;39(3):392-400. doi: 10.1111/ejn.12461.
From genes to pain: nerve growth factor and hereditary sensory and autonomic neuropathy type V.
Capsoni S1.
Britta