Feather pecking has a heritable component with heritabilities for this trait ranging from 0.07 to 0.56.
Sarcoids are also more prevalent in certain familial lines, suggesting that there may be a heritable component.
There is evidence to support that antler size influences mate selection in the red deer, and has a heritable component.
Since schizophrenia has a heritable component, this suggested that genetics may play a role in affecting prospective memory.
Moreover, g appears to be the most heritable component of intelligence.
As for other chronic diseases of the elderly, Parkinson's has no detectable heritable component, studies repeatedly find.
All of these genes together still only account for 10% of the total heritable component of the disease.
As long as a heritable component exists in expression patterns, natural selection is able to act upon the trait.
In the 1990s, Bailey published several papers that suggested a heritable component for sexual orientation.
The term omits characters showing continuous variation (such as weight), even though this has a heritable component.