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Kinetochores of the paired chromatids line up across the equatorial plates of each cell.

9 The chromatids finally separate, becoming chromosomes in their own right, and are pulled to opposite poles. Because of crossing over in prophase I, each new cell will have a different genetic makeup.

Metaphase I

Anaphase I

Telophase I

Metaphase I

Equatorial Plate
Equatorial plate

tThe homologous chromosomes line up on the equatorial (metaphase) plate.

Anaphase I

5 The homologous chromosomes (each with two chromatids) move to opposite poles of the cell.

Telophase I

The chromosomes gather into nuclei, and the original cell divides.

Telophase II

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Telophase II

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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