Questions? Comments? Please contact Dr. Phillip McClean or Christina Johnson.

OVERVIEW
Flythrough Tour
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MOLECULAR PROCESSES
Transcription
Regulated Transcription
mRNA Processing
mRNA Splicing
Translation
Lac Operon
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CELLULAR PROCESSES
Protein Trafficking
Protein Modification
Protein Recycling
Insulin Signaling
Constitutive Secretion
Regulated Secretion
Mitochondrial Protein Transport
Mitosis
Meiosis
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CELLULAR ENERGY CONVERSION
Atp Synthase (Gradients)
Electron Transport Chain
Photosynthesis (Light Reaction)
Photosystem II
Glycolysis (Overview)
Glycolysis (Reactions)
Citric Acid Cycle (Overview)
Citric Acid Cycle (Reactions)
Energy Consumption
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HOME > MEIOSIS > ADVANCED LOOK > 1.) MEIOSIS I > 2.) MeIOSIS II
Meiosis: Advanced Look --> 2.) Meiosis II

Meiosis II is the second cell division event in meiosis. It resembles mitosis, but results in four haploid gametes, rather than two daughter cells. Clicking on each of the thumbnail images will bring up a larger, labeled version of the described scene.

To see the Flash movie for the following sequence of images, click here.

Meiosis II follows Meiosis I, and while the process is similar to mitosis, the results are genetically different. The first stage of Meiosis II is prophase II. Here the chromosomes condense once again, while the nuclear membrane breaks down and a spindle apparatus begins to form in each of the daughter cells.

Next comes metphase II. During this stage the spindle fibers attach to the kinetchores of each sister chromatid, and the chromosomes align at the equator of each cell. The alignment of the sister chromatids is completely random.

This is followed by anaphase II, where the cells elongate and the sister chromatids are finally separated and pulled to opposite ends of the cells. The sister chromatids are now considered chromosomes.

Finally, during telophase II, the chromsomes uncoil, new nuclear membranes form, the spindle fibers are broken down, and the cells are split once again during cytokinesis. This results in the formation of four new haploid cells called gametes. If a haploid male gamete and a haploid female gamete combine, they form a new diploid zygote which can go on to become an embryo.

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