| Term 
 
        | In general, where does recombination usually occur? |  | Definition 
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        | Term 
 
        | During what type of cell division does recombination often occur and what is it called? |  | Definition 
 
        | During meiosis have crossing over |  | 
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        | Term 
 
        | What is equal vs unequal crossing over? |  | Definition 
 
        | Equal crossing over is like exchange of the same material.  Unequal crossing over is unequal sharing of DNA=bad mutations. |  | 
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        | Term 
 | Definition 
 
        | remove bad gene and replace it with a new one. |  | 
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        | Term 
 
        | What is illegitimate recombination? |  | Definition 
 
        | Gene is inserted in the wrong place.  (pretty common in gene therapy) |  | 
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        | Term 
 
        | What are the three main problems with gene therapy? |  | Definition 
 
        | The size of the gene you have to put in, gene silencing by the cell itself (so it wouldn't work), insertional mutagenesis...you cause other mutations/problems/oncogenesis by inserting in the wrong place.  Also, viral vectors can causes immune response and death. |  | 
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        | Term 
 
        | What is the point where DNA's interact called? |  | Definition 
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        | Term 
 
        | How does hemophilia A (factor IIIV deficiency) happen? |  | Definition 
 
        | There is an inverted repeat of the factor IIIV gene.  It likes to bind to itself by complementarity. If you get crossing over, gene oriented the wrong way= bad news bears. |  | 
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