Figure 7: An example of gender determination by standard PCR amplification using sex-specific primer sequences cloned from RAPD gel. A. Random amplified polymorphic DNA fingerprints of female and male ducks. B. Duck genomic DNA was used as template and amplified by standard PCR with sexspecific primers. Sex-specific bands on agarose gel were present in females only. M: DNA ladder markers; Control: amplified 18S ribosomal gene fragments.