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21 Cards in this Set
- Front
- Back
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These types of cells undergo meiosis to produce gamets.
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germ cells
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Every cell in the human body with the exception of sex cells has _________chromosomes.
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46
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The number of chromosomes contained in each cell is called the ______ number.
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Diploid
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Through the process of meiosis, germ cells produce gamets which are ___________, or have half the number of chromosomes.
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Haploid
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During ___________, the chromosomes condense and become visible. Additionally, homologus chromosomessynapse and form Tetrads.
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Prophase 1
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These are pairs of chromosomes, one from each parent.
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homologus chromosomes
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How many pairs of homologus chromosomes do humans have?
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23
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During this phase, spindle fibers pull the homologus chromosomes towards the metaphase plate in preparation for the next phase of meiosis.
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Metaphase 1
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During ____________, the homologus chromosomes are separated from each other and pulled towards opposite ends of the cell.
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Anaphase 1
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The separated homologus chromosomes arrive at opposite poles of the celland the nuclear membrane begins to form around the resulting nuclei.The cells are now considered haploid, since homologus chromosomes have been separated into 2 different cells.
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Telophase 1
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The nuclear membrane begins to break down and the chromosomes begin to condense and become visible. The cells are now haploid, and contain half the number of chromosomes as the origional parent cell.
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Prophase 2
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Spindle fibers attach to the centromers and pull the sister chromatids toward the metaphase plate.
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Metaphase 2
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Sister chromatids are separated form each other and pulled toward opposite ends of the cell.
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Anaphase 2
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Once sister chromatids are separated from each other, they are considered separate chromosomes and are called
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daughter chromosomes
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The daughter chromosomes arrive at opposite poles of the cell and the nuclear membrane begins to form around the resulting daughter nuclei.
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Telophase 2
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Hair and eye color are examples of __________ traits.
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autosomal
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True or False:
A carrier of a recessive trait disease does not express the disease and therefore is not affected by the disease. |
True
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Men have one___ chromosome and one________chromosome.
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X,Y
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Organisms exhibiting sexual reproduction must reduce the ______ level of their gamets by half to account for the fusion fo those famets to produce viable offspring.
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Ploidy
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The fusion of sperm and egg during fertalization returns the ploidy level to
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Diploid
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Meisois takes place in ______
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gamete cells
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