Key research Vanleewen key terms

▪ MZ twins - Monozygotic; identical twins who share 100% of their DNA. ▪ DZ twins - Dizygotic; non-identical twins who share 50% of their DNA. ▪ Genotype - The set of genes that a person has which is responsible for a particular trait. ▪ Phenotype - The way genes are expressed through physical, behavioural and psychological characteristics