One of the easiest ways of observing the pattern of inheritance within a family is by the construction of a pedigree (or family tree).
A number of symbols are used to construct a tree;
A number of symbols are used to construct a tree;
- Males are represented by squares
- Females are represented by circles
- The male or female in which is affect by a particular characteristic is shaded.
- A union (marriage) is represented by a horizontal line joining the symbols.
- A union between two close relatives is called a consanguineous union, which is shown by double horizontal lines.