Fig. 2

Typical example of distribution of organelle-specific genes on 23 chromosomes in the human sperm cell genome: here, genes each uniquely expressing in “nuclear membrane” of cell. (See Additional file 1: Table S2.) The positive distribution trend is not strong (r² = 0.05); however, when all 10 such sets of organelle-specific genes are fitted together, a statistically strong trend emerges (cf. Figure 3 below). Each datapoint is labelled with its chromosome number. (Chromosomes 2, 9, and 21 share same genome site on central-peripheral axis, and same organelle-specific gene counts; similarly for chromosomes 3 and 4)