Once we started to consider the occurrence greater than you to definitely cross-more than from inside the a segment away from good chromosome ranging from a couple of loci, the situation obviously involves individuals combos of your own sorts of chromatids taking region in various mix-overs. Fig. 2 illustrates happening regarding a pair of cross-overs and you may suggests that five combinations from chromatids (or “strands”) was it is possible to. It bring about individuals frequencies out of recombinant creation: 0, fifty otherwise one hundred%. Although not, if we believe that the fresh new four choice occur randomly (that is “chromatid disturbance” is missing) the typical result is 50% recombination. A comparable average result would be proven to hold for three, five or actually numerous cross-overs, considering always that there is no chromatid interference, an assumption that appears to be not as much

The lower contour suggests the relationship whenever no disturbance (that is utilizing the formula out-of Haldane, 1919)

FIG.dos. The result of several strand plans off a couple get across-overs towards the propportion out of recombinant factors out of meiosis. Read more