It is believed that the function of crossing over is the reshuffling of genetic material in sexually reproducing species. However, the rarity of crossover events (usually 1-2 per chro-mosome) can cause difficulties for their use in breeding. Therefore, much attention is paid to the study of the factors regulating frequency and location of crossovers. One of long-studied factors is heterozygosity. A very remarkable phenomenon was discovered in the analysis of cis-effects, when the relationship between polymorphism in some regions and the recombination rate in neighboring ones was studied. In Arabidopsis F2 plants, when a homozygous region is adjacent to a heterozygous one (which is called juxtaposition by the authors), the frequency of crossovers decreases in homozygous region and increases in neighboring heterozygous ones [4]. There is a redistribution of crossovers, or in authors’ terms, remodelling. One of the authors assumes for this phenomenon an adaptive sense for self-pollinators, as Arabidopsis, and wished that similar studies be carried out on other plants, including outcrosses [3]. Note that we have already observed the effect of juxtaposition in the maze F2 generation (outcross), although we did not interpret it as remodelling [2]. Research on maize has continued since then, and here we present the main results.