Texas A&M University (TAMU) BIOL111 Introductory Biology I Exam 3 Practice Exam

The correct choice highlights the four main stages of mitosis: prophase, metaphase, anaphase, and telophase. These stages are critical for understanding how a eukaryotic cell divides its nucleus and ensures that genetic material is accurately distributed to two daughter cells.

During prophase, chromatin condenses into visible chromosomes, and the mitotic spindle begins to form. The nuclear envelope starts to break down, allowing spindle fibers to attach to the centromeres of the chromosomes.

In metaphase, the chromosomes align at the cell's equatorial plane, known as the metaphase plate. This organization is crucial as it ensures that each daughter cell will receive an identical set of chromosomes during the next phase.

Anaphase follows, where the sister chromatids are pulled apart by the spindle fibers and moved toward opposite poles of the cell. This separation is essential to ensure that each new cell will have the correct number of chromosomes.

Finally, telophase involves the reformation of the nuclear envelope around the separated sets of chromosomes, which begin to de-condense back into chromatin. This marks the end of the mitotic phase, although the division of the cytoplasm, or cytokinesis, will follow, resulting in two distinct daughter