To form fraternal or dizygotic twins two eggs ova are fertilised by two sperm and produce two genetically unique children. Identical twins are formed through the process of meiosis where a fertilised egg separates to form two identical cells with a common genetic information. The Pros And Cons Of Identical Twins Identical Twins Raising Twins Twin Toddlers Identical twins are twins developed from a single egg that has been fertilized with a single sperm meaning they have the same DNA. . Identical twins are monozygotic twins. Which type of twin is more common and why. Identical twins develop from one fertilized egg and can share the same placenta and have two separate or rarely one amniotic sac. Fraternal twins can possess similar or different blood groups. In the case of identical twins it is formed when the fertilized eggs split into two eggs and therefore twins are born while in fraternal twins more than one egg is fertil...
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