"Manhattan Plot is a scatter plot with the Y axis for the negative logarithm form of the p-values for each single nucleotide polymorphism (SNP), and the X axis for the genomic positions in each chromosome. The lower the p-value, the higher the negative logarithm of the p-value. A relatively extreme low p-value is like a skyscraper above the lower level 'buildings'. The SNPs can be classified in
to 22 chromosomes."