Chapter_13_Meiosis_Part_II - Meiosis and Genetic Diversity...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Meiosis Step By Step Interphase I : During this stage, the chromosomes replicate. Prophase I : Chromosomes condense. Homologous chromosomes come together in pairs (called synapsis), forming a complex of four chromosomes (called tetrads). Crossing over occurs.Chromosomes begin to move to the center of the cell. Metaphase I : The chromosomes meet at the center on the metaphase plate. Anaphase I : The spindle apparatus pulls the homologous chromosomes apart to opposite poles. Telophase I : Cytokinesis occurs. Both cells now have a haploid chromosome set, but each chromosome has two sister chromatids. In some species, chromosomes decondense, and an Interphase II occurs. Prophase II : Chromosomes progress to the center Metaphase II : Chromosomes meet at the center plate in one line. Anaphase II : Chromosomes are separated into sister chromatids and they move to opposite ends of the cell. Telophase II : Cytokinesis occurs again. Nuclei begin to form and cells with half the number of the original chromosome begin to appear. Meiosis and Genetic Diversity Part II
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/01/2012 for the course BIO 141 taught by Professor Dr.cafferty during the Spring '11 term at Emory.

Ask a homework question - tutors are online