Psych M.D. - Fraternal Twins


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


Term: Fraternal Twins
Definition (Myers): Twins who develop from separate eggs. They are genetically no closer than brothers and sisters, but they share a fetal environment.
Definition (alternative): A twin who have shared a common uterine environment with its sibling. Fraternal twins are due to the fertilization of two different ova by different sperm. *
Contextual explanation: There are two types of twins, identical and fraternal. Twins that develop from one fertilized egg are called identical, whereas twins that develop from separate eggs are called fraternal. Two eggs are fertilized by different sperms so the genes of fraternal twins are no more similar than those of siblings would be. Fraternal twins could be different sexes, have different blood types, and look nothing alike.

Related terms and concepts: Twin Studies, Environment, Behavior Genetics, Identical Twins
1:33 Dizygotic Twins
Psych M.D. - Fraternal Twins - The NeuronPsych M.D. - Fraternal Twins - The Neuron

Related websites: http://www.keepkidshealthy.com/twins/expecting_twins.html, http://www.multipletreasures.com/facts-about-fraternal-twins.php, http://en.wikipedia.org/wiki/Twin
Edited by: Susie



More pages