Recombinant DNA Technology
Under which of the following conditions would population gene frequencies remain the same?

Selection for homozygotes
Active migration between groups
Random mating
Small population size

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Recombinant DNA Technology
Knockout mice are created by

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

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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
cystic fibrosis results from a three base deletion in most cases but in other cases, other mutations are involved
All of these
an Eco RI cuts DNA at a different sequence than Hind III

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Recombinant DNA Technology
An expression vector

always contains an origin of replication
always contains DNA segments for the regulation of mRNA production
usually contains a gene that confers antibiotic resistance to the bacterial host
All of these

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Recombinant DNA Technology
A human cDNA library

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

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