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 __________ .

genetic drift
inbreeding
heterosis
assortative mating

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

All of these
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

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