Assertion: mutation | /r/HasProperty | deleterious
Facets:
value: in nature
type: LOCATION
value: mostly
type: DEGREE
Source sentences:
text: Because mutations are random changes, they are expected to be mostly deleterious, but some may be beneficial in certain environments.
text: A fitness of zero, less than one, one, more than one, respectively, indicates that mutations are lethal, deleterious, neutral, and advantageous.
text: In nature, the mutations that arise may be beneficial or deleterious—this is the driving force of evolution.
text: Most mutations either have no effect, are deleterious, or are lethal; some provide survival benefits, which are passed on to progeny.