Something that is hereditary is passed from parent to child, either through their genes (such as facial[?] features and certain diseases) or through inheritance (such as a title of nobility).
The link here from quiver relates to a technical meaning from mathematics.
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... are 65 years of age or older. The median age is 34 years. For every 100 females there are 91.0 males. For every 100 females age 18 and over, there are 82.9 males.
The ...