In a plant breeding experiment, scientists crossed two homozygous parental lines (P1 and P2) to produce F1 hybrids, designated as F1- P1/P2. Another group of researchers produced a different set of F1 hybrids (F1-P3/P4) using homozygous parents P3 and P4. Unfortunately, the seeds of F1- P1/P2 hybrids got mixed with F1-P3/P4 hybrid seeds and with seeds of other parental plants not included in the above crosses. To ide