Recombinant DNA Technology
Plant transformation can be obtained by

infecting plants with a tobacco mosaic virus
using the E. coli bacterium to infect plant roots
combining plant and animal cells in culture
shooting DNA into plant cells with a gun

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Recombinant DNA Technology
An example of a restriction fragment length polymorphism is

All of these
cystic fibrosis results from a three base deletion in most cases but in other cases, other mutations are involved
different length fragments of DNA resulting from loss or gain of a restriction site
an Eco RI cuts DNA at a different sequence than Hind III

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