A component of blood cells called a Barr body represents a(n):
a. Aggregation of ribosomes in reticulocytes
b. Clump of polymerized hemoglobin
c. Cytoplasmic inclusion found in eosinophils
d. Enlarged phagocytic vesicle found in neutrophils
e. Inactivated X chromosome extending from the nucleus in neutrophils
ANS: E
A small protrusion from the nucleus, most easily visible in neutrophils, represents one of the pair of X chromosomes that becomes condensed, inactivated, and darkly staining in females.
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