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CHAPTER 22: THE REPRODUCTIVE SYSTEMS

Comparison of Mitosis and Meiosis: (outline page 8)

Event

Mitosis

Meiosis

DNA Replication

Occurs during inter-phase before nuclear division occurs.

Occurs during inter-phase before nuclear division occurs.

Number of Divisions

One (PMAT)

Two (2xPMAT); no replication between divisions; synapsis occurs during PI.

Number of daughter cells & genetic composition

Two, each diploid (2n) and genetically identical to parent cell.

Four, haploid cells (1n), genetically non-identical to parent cell.

Importance

Growth, repair, development of multicellular adult from zygote.

Production of gametes; reduces chromosome # by ½;

variation.

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