Q:

Who is considered a blood relative?

A:

Quick Answer

According to the National Genetics and Genomics Education Centre, blood relatives are classified as first-, second- and third-degree relatives. First-degree blood relatives include parents, siblings and children. First-degree relatives share approximately half of their genes with one another.

Know More
Who is considered a blood relative?
Credit: images by Tang Ming Tung Moment Getty Images

Full Answer

Second-degree blood relatives are uncles, aunts, nephews, grandchildren, grandparents and half-siblings. Second-degree blood relatives share approximately 25 percent of their genes with one another. Moreover, in the United States, first cousins, first cousins once removed and first cousins twice removed are considered second-degree blood relatives.

Third-degree blood relatives are great-grandparents or great-grandchildren. Approximately one-eighth of genetic material is shared between third-degree blood relatives. In the United States, second cousins are considered third-degree blood relatives.

Blood relation decreases as the ancestral and genealogical lines become more distant.

Learn more about Genealogy

Related Questions

  • Q:

    What is normal blood pressure for men?

    A:

    According to WebMD, blood pressure in the normal range is classified as 120 over 80. The top number is the systolic and the bottom number is diastolic.

    Full Answer >
  • Q:

    Why is blood classified as a tissue?

    A:

    According to School of Medicine at Southern Illinois University Carbondale, blood is classified as a type of connective tissue because it has the same mesodermal origin as other connective tissues. As About.com describes, all connective tissues, including blood, consist of cells dispersed in the extracellular matrix.

    Full Answer >
    Filed Under:
  • Q:

    What causes elevated blood platelets?

    A:

    High platelets are classified as either primary thrombocythemia, which can be inherited but does not have another known cause, and secondary thrombocytosis, which can be a symptom of another condition such as anemia, blood loss or cancer, according to Healthgrades. Other possible causes of secondary thrombocytosis include infections and inflammatory disorders.

    Full Answer >
  • Q:

    What are the different types of blood?

    A:

    The four different groups of blood are classified as group A, group B, group AB and group O, according to the American Red Cross. Each group contains two blood types, a plus type and a minus type. For example, blood group A includes type A+ and A-.

    Full Answer >
    Filed Under:

Explore