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Twin - Wikipedia One twin, the 'donor' twin, is small and anemic, the other, the 'recipient' twin, is large and polycythemic The lives of both twins are endangered by this condition
Twin | Identical, Monozygotic, Dizygotic | Britannica Twin, either of two young who are simultaneously born from one mother Twinning, common in many animals, is of two biological kinds: the one-egg (monozygotic), or identical, type and the two-egg (dizygotic), or fraternal, type
Understanding Twins - Psychology Today There are different types of twins, identical and fraternal being the most common Identical, or monozygotic, twins develop from the same fertilized egg that splits into two These twins are
Identical Twins: DNA, Conception, Statistics, and More Identical twins, also known as monozygotic twins, share the same egg at conception and are always either both boys or both girls Fraternal twins, also known as dizygotic twins, come from two separate eggs fertilized at the same time They could be the same sex or different
Twin study - Wikipedia Twin research is considered a key tool in behavioral genetics and in related fields, from biology to psychology Twin studies are part of the broader methodology used in behavior genetics, which uses all data that are genetically informative – siblings studies, adoption studies, pedigree, etc