Abstract
IT HAS been demonstrated that genetic variation exists in hemoglobin types of the hatched chick. The hemoglobin types have been designated as Type I (homozygous normal), Type II (homozygous abnormal) and Type III (heterozygote) by Washburn (1968a). A “major band” is present in all birds in combination with either or both of two “minor”, more acidic bands. The bands differ in their electrophoretic properties; the abnormal “minor” band migrates in an electrical field at a faster rate than that of the normal “minor” hemoglobin component. The differences in electrophoretic properties of the minor hemoglobin components are due to allelic, codominant genes (Washburn, 1968a).The adult hemoglobin type can vary, depending on the genotype of the bird. This variation could explain some of the disagreement found in the literature pertaining to the normal hemoglobin types of chick embryos, when the adult type hemoglobin (Hb) appears, and which components should be considered…
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