An ancestor is a parent or (recursively) the parent of an ancestor (i. A parent is a Father or Mother; one who sires or gives Recursion, in Mathematics and Computer science, is a method of defining functions in which the function being defined is applied within its own definition e. , a grandparent, great-grandparent, great-great-grandparent, great-great-great-grandparent, great-great-great-great-grandparent, and so forth). Family denotes a group of People affiliated by consanguinity affinity or co-residence Family denotes a group of People affiliated by consanguinity affinity or co-residence Family denotes a group of People affiliated by consanguinity affinity or co-residence

Two individuals have a genetic relationship if one is the ancestor of the other, or if they share a common ancestor. Genetics (from Ancient Greek grc-Latn genetikos, “genitive” and that from grc-Latn genesis, “origin” a discipline of Biology, is In evolutionary theory, species who share an evolutionary ancestor are said to be of common descent. eVolution is the third Album by eLDee, it was due to be released in 2008 A group of organisms is said to have common descent if they have a common Ancestor. However, this concept of ancestry does not apply to some bacteria and other organisms capable of horizontal gene transfer. The Bacteria ( singular: bacterium) are a large group of unicellular Microorganisms Typically a few Micrometres in length bacteria have

Assuming that all ancestors are unrelated, an individual has 2ⁿ ancestors in the nth generation before him and about 2^g+1 total ancestors in the g generations before him. In practise, however, it's clear that the vast majority of ancestors of humans (and indeed any other species) are somehow related. Consider n = 40: the human species is surely more than 40 generations old, yet the number 2⁴⁰ dwarfs the number of humans that have ever lived.

Some cultures place great reverence on ancestors, both living and dead; contrastingly, people in more youth-oriented cultural contexts may display a lesser degree of veneration for elders. In other cultural contexts, some people seek providence from their deceased ancestors; this practice is sometimes known as ancestor worship or, more accurately, ancestor veneration.

As far as contribution to ones autosomal DNA is concerned (this does not include Y-chromosomal DNA or mitochondrial DNA) assuming that none of one's ancestors had children with relatives (even distant relatives), an individual has a total of 2046 ancestors up to the 10th generation, 1024 of which are 10th-generation ancestors. With the same assumption, Any given person has over a million 20th-generation ancestors (generally equivalent to around 500 years) and this theoretical number increases past the total population of the world at around 1400 AD.

See also

• Genealogy
• Ancestor worship
• Cousin
• Family
• Family relationship
• Most recent common ancestor
• Kinship
• Ethnicity

Genealogy (from Greek: el γενεά el-Latn genea, "descent" and el λόγος el-Latn logos, "knowledge" is the study of cousin in Kinship terminology is a relative with whom one shares a common Ancestor, but in modern usage the term is rarely used when referring to a Family denotes a group of People affiliated by consanguinity affinity or co-residence cousin in Kinship terminology is a relative with whom one shares a common Ancestor, but in modern usage the term is rarely used when referring to a In Genetics, the most recent common ancestor ( MRCA) of any set of Organisms is the most recent individual from which all organisms in the group are directly Kinship is a relationship between any entities that share a genealogical origin through either biological cultural or historical descent

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