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14 Cards in this Set
- Front
- Back
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Each organism must inherit a single copy of every gene from each of its what?
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"parents"
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Gametes are formed by a process that separate s the two sets of genes so that each gamete ends up with what?
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with just one set.
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All organisms have different numbers of?
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chromosomes |
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A body cell in an adult fruit fly has 8 chromosomes: 4 from the fruit fly's male parent and 4 from its?
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female parent |
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Meiosis involves two divisions, what are they?
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Meiosis I and Meiosis II.
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By the end of meiosis II the diploid cell that entered meiosis has become what?
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four haploid cells
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Interphase of Meiosis I: Each chromosome pairs with its corresponding homologous chromosome to form what? |
a tetrad
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Prophase I: When homologous chromosomes form tetrads in meiosis I, they exchange portions of their chromatids in a process called what? |
crossing over
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What does crossing over do?
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produces new combinations of alleles
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The two cells produced by meiosis I have chromosomes and alleles that are different from each other and from the what?
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diploid cell that entered meiosis I. |
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In meiosis II the two cells produced by meiosis I now enter what?
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a second meiotic division.
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Unlike meiosis I, meiosis II neither of the cells go through what?
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chromosome replication
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Each other the cells chromosomes have what?
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2 chromatids
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Meiosis I results in two haploid (N) daughter cells each with half the number of what from the original cell?
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number of chromosomes |
