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23 Cards in this Set
- Front
- Back
A nuclear division which reduces the chromosome number so that the gametes have half the species number of chromosomes. |
Meiosis |
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What happen to the parent cell before meiosis? |
The parent cell is diploid; it contains pairs of chromosomes called homologues. |
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Homologues |
A pair of homologues have the same shape and size. They form a tetrad because each homologue has two chromatids. |
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Tetrad |
A pair of homologues. |
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What happens after meiosis? |
The daughter cell are haploid; they contain only one from each pair of homologues. |
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What are the phases of Meiosis I? |
Prophase I Metaphase I Anaphase I Telophase I |
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DNA coils into chromosomes, the nucleolus and nuclear envelope disappear, the mitotic spindle forms, and synapsis (crossing-over) occurs. |
Prophase I |
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Tetrads line up randomly along the midline, spindle fibers attach to the centromere of each homologous chromosome. |
Metaphase I |
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Homologous chromosomes move to the opposite poles of the cell |
Anaphase I |
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The chromosomes reach the opposite end of cell and cytokinesis begins |
Telophase I |
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What are the phases of Meiosis II? |
Prophase II Metaphase II Anaphase II Telophase II |
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Spindle fibers form and begin to move the chromosomes toward the midline of the dividing cell. |
Prophase II |
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Chromosomes move to the midline of the dividing cell, facing opposite poles of the dividing cell. |
Metaphase II |
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The chromatids seperate and move toward opposite poles of the cell. |
Anaphase II |
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A nuclear membrane forms around the chromosomes in each of the 4 new cells. |
Telophase II |
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The reproductive events that occur from one generation to the next. It involves both mitosis and meiosis. |
Life Cycle |
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Name the organs that produce gametes |
Men - Penis Women - Vagina |
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Name the process that produces gametes |
Men - Spermatogenesis Women - Oogenesis |
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Types of cell division involved in the process |
Meiosis |
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Name of the gamete |
Man - Sperm Women - Egg |
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Number of chromosomes in gamete |
Men -23 Women - 23 |
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Result of fermentation |
zygote |
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Number of chromosomes provided |
46 |