the test consists of administering the test compound to animals and then , after 30 , 48 and 72 hours , making preparations from the bone marrow and calculating the percentage of polychromatic erythrocytes with micronuclei ( index of genotoxic effects of the compound ) and the ratio of polychromatic to normochromatic erythrocytes ( index of toxic effects of the substance on bone marrow cells ) .
C0005953
bone marrow
C0005955
bone