Color and growth changes occur frequently in the endosperm, aleurone and pericarp tissue of maize as shown by microscopic examination. The color changes are: alterations from colored to uncolored areas or the reverse without any accompanying change in adjoining areas, uncolored areas paired with darker colored areas (twin spots and twin stripes), uncolored areas paired with areas that are changed in color, and darker colored areas alone. The growth changes involve areas of larger cell size, depressions, outgrowths, and depressed areas paired with outgrowths. Both depressed areas and outgrowths may be accompanied by loss or alteration of color. All of these mosaics result from a removal or shifting of genes from one cell to another due to various kinds of chromosome aberration in developing somatic tissue.