A pedigree chart shows the presence or absence of a trait or gene through generations within a family. Pedigree charts are used to identify dominant and recessive characteristics. It is used to identify and examine the pattern of inheritance of a specific trait in a lineage.

This diagram is about x linked dominant.

This kinghsip diagram is about y linked disorder.

This kingship diagram is about x linked recessive disorder.

Hemophilia is a rare disorder in which your blood doesn't clot normally because it lacks sufficient blood-clotting proteins (clotting factors). Hemophilia is a sex-linked recessive disorder. The gene with the instructions for making factor is found only on the sex chromosome labeled X. This genogram shows the family pedigree when the father is with hemophilia and the mother is normal.

Hemophilia is a rare disorder in which your blood doesn't clot normally because it lacks sufficient blood-clotting proteins (clotting factors). Hemophilia is a sex-linked recessive disorder. The gene with the instructions for making factor is found only on the sex chromosome labeled X. This genogram shows the family pedigree when the father is with hemophilia and the mother is a carrier.

In autosomal recessive inheritance, both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition. Autosomal recessive disorders are typically not seen in every generation of an affected family. (Refer: U.S. National Library of Medicine)

One mutated copy of the gene in each cell is sufficient for a person to be affected by an autosomal dominant disorder. In some cases, an affected person inherits the condition from an affected parent. In others, the condition may result from a new mutation in the gene and occur in people with no history of the disorder in their family. (Refer: U.S. National Library of Medicine)

X-linked recessive disorders are also caused by mutations in genes on the X chromosome. In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition. In females (who have two X chromosomes), a mutation would have to occur in both copies of the gene to cause the disorder. (Refer: U.S. National Library of Medicine)

X-linked dominant disorders are caused by mutations in genes on the X chromosome, one of the two sex chromosomes in each cell. In females (who have two X chromosomes), a mutation in one of the two copies of the gene in each cell is sufficient to cause the disorder. (Refer: U.S. National Library of Medicine)