Which properly traces the movement of chromosomes during mitosis?
A. Homologous chromosomes pair up in the center of the cell and then separate to opposite ends of the cell.
B. Sister chromatids line up in the center of the cell and separate to opposite ends of the cell.
C. Crossing-over takes place, and single chromatids randomly segregate to opposite ends of the cell.
D. Single chromatids pair with their homologous partner, duplicate, and separate to opposite ends of the cell.
Ans: B. Sister chromatids line up in the center of the cell and separate to opposite ends of the cell.
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Fill in the blank(s) with the appropriate word(s).