Location of repetitive elements found on the Y chromosome. A metaphase from a male fish showing the hybridization signals for dmrt1a and dmrt1bY (green signals), and the repetitive elements (335-bp, 338-bp, 363-bp, and 551-bp repeat) (red signals). These repetitive elements were initially identified on the Y chromosome in the Y-specific region. Red signals are located together with the green signal on the Y chromosome (Y), but are also detected on another pair of acrocentric chromosomes (arrowheads). The green signals at the tip of another pair of chromosomes represent the autosomal (LG9) dmrt1a gene. Consistent with the nucleotide sequence analyses, the repeats are not found on the X chromosome nor colocalize with the autosomal dmrt1a.
