What is another name for identical twins in genetics?

Identical twins are referred to as monozygotic twins in genetics because they originate from a single fertilized egg, or zygote, that splits into two embryos. This process results in two genetically identical individuals who share the same genetic material. Monozygotic twins share the same DNA and are often studied in genetic and psychological research to explore the influence of genetics on behavior and development in comparison with fraternal twins, who are known as dizygotic twins and result from the fertilization of two separate eggs. Understanding the concept of monozygotic twins is crucial in the study of psychopathology, as researchers frequently use twin studies to disentangle the effects of nature (genetics) and nurture (environment) on various psychological outcomes.