Place five copies of each digit 1-9 in the grid. All five copies of the same digit must be in cells that are orthogonally connected. To fit all the digits into the grid, some cells are 'S-cells' that contain two DISTINCT digits. If a cell has one digit, write it in the top left corner. In an S-cell, write the smaller digit top-left and the larger bottom-right. Split Gene Lines: The sum of all digits in cells on a DNA strand is equal to the concatenation of the 2-4 digits in the zygote cells at the end of the strands in some order. For example if the zygotes were a 38 and a 49 s-cell, then 9348 would be a valid sum for the line.
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