The invention relates to methods for genetic analysis of DNA sequences containing complementary duplicons which are duplicated and linked DNA sequences separated by an intermediate sequence. Furthermore, the invention relates to the Bidirectional Amplification of Complementary Duplicons (BACD) using a single primer. The amplification of complementary duplicons can be used for a variety of purposes such as, but not limited to, determining the species from which a sample comprising genomic DNA is derived, or used as a marker for a trait of interest. Also provided are means for analysing large datasets which can be used to identify primers useful for the genetic analysis methods of the invention.