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If enforcement of antitrust laws caused the two largest firms in this table to be divided in half, with each half having equal market share, the industry's four-firm concentration ratio would and its Herfindahl index would .
Mitotic Spindle
A structure composed of microtubules that forms during cell division to separate chromosomes into each of the two daughter cells.
Anaphase
Stage of mitosis in which the chromosomes move to opposite poles of the cell; anaphase occurs after metaphase and before telophase.
Centromere
A specialized constricted region of a chromatid; contains the kinetochore. In cells at prophase and metaphase, sister chromatids are joined in the vicinity of their centromeres.
Nucleosomes
Structural units of a chromosome, consisting of a segment of DNA wound around a core of histone proteins.
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