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The power of twin designs arises from the fact that twins may be either identical (monozygotic (MZ), i.e. developing from a single fertilized egg and therefore sharing all of their polymorphic alleles) or fraternal (dizygotic (DZ), i.e. developing from two fertilized eggs and therefore sharing on average 50% of their alleles, the same level of genetic similarity found in non-twin siblings).
We have different shoe sizes. I'm 38/UK 5 while she's 39 UK 5.5. Very annoying as it's the only thing we can't share. #26. Identical twin here. I have type 1 diabetes and my twin brother doesn’t ...
The human twin birth rate in the United States rose 76% from 1980 through 2009, from 9.4 to 16.7 twin sets (18.8 to 33.3 twins) per 1,000 births. [5] The Yoruba people have the highest rate of twinning in the world, at 45–50 twin sets (90–100 twins) per 1,000 live births, [6] [7] [8] possibly because of high consumption of a specific type of yam containing a natural phytoestrogen which may ...
There is evidence of heritability in personality traits. For example, one study found that approximately half of personality differences in high-school aged fraternal and identical twins were due to genetic variation - and another study suggests that no one personality trait is more heritable than another. [6] [8]
Fraternal twins develop from two different eggs by two different sperm -- so they can often look slightly different. Although some, like Mary Kate and Ashley Olsen, end up looking so much alike ...
After identical twin sisters from Delaware married identical twin brothers from Tennessee, the children they are raising together share in a rare biological phenomenon. When identical twin sisters ...
Twenty-three sets of twins have graduated from a Massachusetts middle school, making up about 10% of the eighth-grade class. The school gave a special shout-out to the 23 sets of twins during the ...
Alain Eizmendi, identical twin brother; Marc Elliott, twin sister [3] ... John Maine, fraternal twin brother; Rami Malek, identical twin brother; Shawn Marion, twin ...