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- ... Y chromosomes Did you know? Females have two copies of the X chromosome, while males have one ...
- ... It turned out that the woman had two copies of a rare variation in the APOE gene, ...
- ... uses a safe virus to deliver a new copy of the SMN gene into specific neurons to ...
- ... Fast Facts Did you know? Females have two copies of the X chromosome, while males have one ...
- ... notarized. Tell key family members where you keep copies of your health care directive. Source: National Institute ...
- ... removing a patient's bone marrow and then adding copies of a correctly spelled gene for normal hemoglobin ...