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Hemoglobin C Trait

About 1 out of every 40 African-Americans has hemoglobin C trait. This trait also affects people whose ancestors came from Italy, Greece, Africa, Latin America, and the Caribbean region.

However, it is possible for a person of any race or nationality to have hemoglobin C trait.

People with hemoglobin C trait have red blood cells that have normal hemoglobin A and an abnormal hemoglobin. The abnormal hemoglobin is called hemoglobin C. People with hemoglobin C trait have slightly more hemoglobin A than hemoglobin C. People with Hemoglobin C trait do not have health problems related to having the trait.

People with hemoglobin C do not have Hemoglobin C disease or sickle cell disease. They cannot develop these diseases later in life. They can pass hemoglobin C trait to their children.

Hemoglobin D Trait

People with hemoglobin D trait have red blood cells that have normal hemoglobin A and an abnormal hemoglobin. The abnormal hemoglobin is called hemoglobin D. People with hemoglobin D trait have slightly more hemoglobin A than hemoglobin D. People with Hemoglobin D trait do not have health problems related to having the trait.

People with hemoglobin D trait do not have Hemoglobin D disease or sickle cell disease. They cannot develop these diseases later in life. They can pass hemoglobin D trait to their children.



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  • Home
  • What Does the SC Crew Do?
  • Mentor a Youth
  • Camp Gibbous
  • What is Sickle Cell Disease
    • What is Sickle Cell Disease
    • Who is Affected?
    • Sickle Cell Trait
  • Programs & Services
    • Programs & Services
    • SC Crew for Teens
    • Camp Gibbous
    • Camp Crescent Moon
    • Hemoglobin Trait Follow-up Program
    • Support/Network Groups
  • Congratulations & Celebrations
    • Congratulations & Celebrations
  • News
  • About Us
    • About Us
  • Resources
    • Sickle Cell Educational Materials
    • No Longer a Child's Disorder
  • Donate
    • Donate
    • Corporate Matching Gifts
    • Donations through United Way
    • Community Health Charities of California
    • Combined Federal Campaign
    • Wills/Bequests
    • Planned Giving
    • In-kind Gifts
  • Volunteer
  • Contact Us