DIZYGOTIC TWINS (DZ TWINS) By N., Pam M.S. - April 7, 2013 Twins that have developed from two separate and eggs fertilised by separate sperm. Also called fraternal twins.See twin studies. DIZYGOTIC TWINS (DZ TWINS): "Dizygotic twins are fraternal twins." Related Psychology Terms TWIN STUDIES CONCORDANCE IN TWINS DICHORIAL TWINS IN VITRO FERTILIZATION SPERM COMPETITION TWIN CONTROL CONJOINED TWINS EMBRYO ZYGOTE INTRAFALLOPIAN TRANSFER (ZIFT) DISCORDANCE Cite this page: N., Pam M.S., "DIZYGOTIC TWINS (DZ TWINS)," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/dizygotic-twins-dz-twins/ (accessed February 18, 2020).