In recombination 46 recombination frequencies of

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Unformatted text preview: stances between them along a chromosome The probability of a crossover occurring between two genes increases with the distance separating them student of morgan’s A.H. Sturtevant proposed that the percentage of recombination, or recombination frequency (RF), could be used as a gauge of the physical distance between any two genes on the same chromosome 1% RF = 1 centimorgan (cM) = 1 map unit (m.u.) 47 Recombination frequencies provide the basis of genetic mapping 48 Experimental recombination frequencies between two genes are never greater than 50% 49 Recombination frequencies of 50% between two genes indicates the genes are either not on the same chromosome or are at a great distance from each other on the same chromosome. In this case, one way to determine if the genes are on the same chromosome is to show linkage with other genes that lie between them. 50 Next topic Map distances Chapter 7 pp 141-148 51...
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This document was uploaded on 02/25/2014.

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