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Transgenic Animals

d in inner cell mass of host blastocyst

  • Introduce several such blastocysts into pseudopregnant mouse

  • Birth

  • Transgenic mouse

  • Microinjection of DNA Injection of linear DNA molecules into fertilized eggs (pronuclear stage) using an inverted microscope, micromanipulation equipment and injection / holding devices.

    Fig. 3 Transgenic animals with DNA-Injection into the cell pronucleus The first successful production of transgenic mice using pronuclear microinjection was reported in 1980 [1]. The pronuclear microinjection method of producing a transgenic animal results in the introduction of linear DNA sequences into the chromosomes of the fertilized eggs. If this transferred genetic material is integrated into one of the embryonic chromosomes, the animal will be born with a copy of this new information in every cell. The foreign DNA must be integrated into the genome prior to the doubling of the genetic material that precedes the first cleavage.

    If this does not occur, only a few cells will integrate the gene. For this reason, the DNA is introduced into the fertilized egg at the earliest stage, which is the pronuclear period immediately following fertilization. For several hours following the entry of the sperm into the oo
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    Related biology technology :

    1. Biolistic Gene Transfer to Generate Transgenic Schistosomes, Rev A
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