Recombinant DNA Technology
When populations are small, gene frequencies can change from generation to generation and some alleles may become fixed in a population. This is called __________ .

heterosis
inbreeding
genetic drift
assortative mating

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Recombinant DNA Technology
Knockout mice are created by

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

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Recombinant DNA Technology
Which of the following is correct in terms of determination of location of genetic traits?

Known protein coding sequences are too far apart to allow linkage determination for most new genes
Protein-coding genes are always associated with a restriction pattern
Restriction sites allow DNAs to be digested
None of these

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