- panmixis
- paracentric inversion
- parthenogenesis
- penetrance
- pericentric inversion
- pharmacogenetics
- phenocopies
- phenotype
- phenylalanine
- pleiotropic gene
- polymorphism
- populations genetics
- pregnancy
- preimplantation diagnosis
- prenatal diagnosis
- prophase
- proto-oncogene(s)
- pseudogenes
- pulsed field gel electrophoresis