Original sentence: , a grandparent, great-grandparent, and so on).An ancestor is a parent or (recursively) the parent of an ancestor (i.However, this concept of ancestry does not apply to some bacteria and other organisms capable of horizontal gene transfer.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.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.Two individuals have a genetic relationship if one is the ancestor of the other or if they share a common ancestor; in evolutionary theory, species who share an evolutionary ancestor are said to be of common descent
Edited sentence: (The concept of ancestry does not apply to some bacteria and similar organisms which are capable of direct horizontal gene transfer.An ancestor is a parent or (recursively) the parent of an ancestor.Ancestor worship.Examples of an ancestor include a father or mother, as well as grandparents,  great-grandparents, etc.Some societies, such as the Chinese, have been know to participate in ancestor worship; however, in most modern societies ancestor worship has been replaced with genealogy and the creation of family trees.Two individuals have a genetic relationship if one is the ancestor of the other or if they share a common ancestor; in evolutionary theory, this is referred to as common descent