Fig. 4 Representative Polyacrylamide Gel Electrophoresis. (A) Two types of D13S317 amplicons were detected for embryo #10, corresponding to the long paternal allele (lane 1) and the long maternal allele (lane 2). PCR reactions with no amplicons are not included in this electrophoresis. (B) Three types of D8S1179 amplicons were detected for embryo #1: two corresponding to the long and short paternal alleles (lanes 1 and 2) and one corresponding to the maternal allele (lane 3). M, DNA size marker; Pat, paternal blood; Mat, maternal blood.