Assertion: gene's mutation | /r/CapableOf | occur before embryonic development
Facets:
value: spontaneously
type: TEMPORAL
Source sentences:
text: The mutation responsible can occur spontaneously before embryonic development (a de novo mutation), or it can be inherited from two parents who are carriers of a faulty gene (autosomal recessive inheritance) or from a parent with the disorder (autosomal dominant inheritance).