A sex chromosome in certain animals, such as chickens, turkeys, and moths. In humans, males are XY and females XX, but in animals with a Z chromosome, males are ZZ and females are WZ.
In opthalmology, the bending of light that takes place within the human eye. Refractive errors include nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. Lenses can be used to control the amount of refraction and correct those errors.
- Leukemia, juvenile myelomonocytic leukemia
Juvenile myelomonocytic leukemia.
- Leukemia, lymphocytic
Cancer of blood cells that are precursors of lymphocytes. The two major types of lymphocytic leukemia are acute lymphoblastic leukemia (ALL) and chronic lymphocytic leukemia (CML). Also known as lymphoid leukemia.
- Leukemia, myelogenous
A condition in which the bone marrow makes too many white blood cells. Early symptoms include fatigue and night sweats. Treatment may be by radiation, chemotherapy, biological therapy, or bone- marrow transplant. Also known as chronic myelogenous leukemia (CML), chronic granulocytic leukemia.