Recombinant DNA Technology
Knockout mice are created by

creating a chimera by fusing cells from two different cell lines
transfecting embryonic stem cells with an altered gene sequence
infecting the mouse with a retrovirus
mutagenizing a mouse and selecting for mutant offspring

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Recombinant DNA Technology
A human cDNA library

cannot be used to obtain human genes because it would be radioactive
None of these
contains DNA for virtually all of the human proteins in vectors
contains DNA for specific human proteins

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

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
cystic fibrosis results from a three base deletion in most cases but in other cases, other mutations are involved
All of these

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