What is a family tree?

A family tree is a simple chart representing family relationships in a conventional tree structure form.

Family "tree" in the botany section; I get it, very funny, haha.
How 'bout ,what's a dogwood (does it "bark"?) in the zoology
section.
good one.

chart of family information: a chart that shows the relationships of members of a family over time, including dates of marriages, births, and deaths

A pedigree, it shows an individuals breeding. Who his parents, grandparents, their grandparents, etc etc where. For some examples go to: ancestry.com, and look at some there.

your family history ...you on bottom(with siblings) your parents branch off above you their parents above them etc
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Shows the parents of a specific species...and then the parent's parents...etc...

It's like a mermaid except they cut off the sacrificed ones legs plant them and then after the roots grow you have a family tree.