Practice Exam 3, Biology 211, Sections 1 and 4, Fall, 2007

The number of DNA molecules per chromatid varies between one and two depending on the time in the cell cycle. d. The number of DNA molecules per chromatid is described by the term ploidy. Thus, diploid cells contain two, tetraploid four, etc. e. Each gene is a DNA molecule, and chromosomes contain many genes, therefore each chromatid contains a ... ................
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