Genealogy

[Little_Girl]

An account or history of the descent of a person or
family from an ancestor; enumeration of ancestors and their children in
the natural order of succession; a pedigree.

[Mark Zuckerberg]

The research of your family history. Searching to find out who your forfathers were and where they were from. Keeping a record or tree of where your genes originated from.
THE 1ST GENERATION
1--yourself
THE 2ND GENERATION (2-3)
2--father
3--mother
THE 3RD GENERATION (4-7)
4--grandfather, (your fathers father)
5--grandmother, (your fathers mother)
6--grandfather, (your mothers father)
7--grandmother, (your mothers mother)
THE 4TH GENERATION (8-15)
8--great grandfather, (your grandfathers father)
9--great grandmother, (your grandfathers mother)
10--great grandfather, (your grandmothers father)
11--great grandmother, (your grandmothers mother)
12--great grandfather, (your grandfathers father)
13--great grandmother, (your grandfathers mother)
14--great grandfather, (your grandmothers father)
15--great grandmother, (your grandmothers mother)
THE 5TH GENERATION (16-31)
THE 6TH GENERATION (32-63)
Each time you add a generation the numbers double. Number 1s father is #2, his grandfather is #4 and great grand father is #8. If you want their wives you add one to the number.
You can add as much info to your trees as you like such as Medical History, Birth/Death Dates/Places, Siblings, Children.

[Zipporah Schumaker]

When you do some serious (most often sexual) research among several family members.

[Cami]

(the study of) the history of the past and present members of a family or families:

[Lanell]

A line of descent traced continuously from an ancestor.