FIGURE 21.31 Relatedness of DNA by Filter Hybridization
(A) DNA No. 1 is denatured and attached to a filter. (B) When DNA No. 2 is added to the filter, some of the DNA strands will hybridize, provided that the sequences are similar enough. If the sequence is identical, all of the single-stranded red DNA should hybridize to strands of green DNA. If the sequences are very different, little or none of the green DNA will hybridize with the red.
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