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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 ...
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).
Alain Eizmendi, identical twin brother; Marc Elliott, twin sister [3] ... John Maine, fraternal twin brother; Rami Malek, identical twin brother; Shawn Marion, twin ...
Contrary to popular belief, the Olsen twins are fraternal twins, not identical, so it wouldn't be odd for the two to look different as they get older. This may just be the tabloids' most recent ...
Dizygotic (fraternal) twins can be caused by a hyperovulation gene in the mother. [8] Although the father's genes do not influence the woman's chances of having twins, he could influence his children's chances of having twins by passing on a copy of the hyperovulation gene to them. Monozygotic (identical) twins do not run in families.
Among the graduates are two sets of identical twins and 12 sets of fraternal twins, NBC 6, our South Florida ... Gabrielle and Jocelyn Reed are one such set of identical twins. “It was a great ...
The word zygosity may also be used to describe the genetic similarity or dissimilarity of twins. [6] Identical twins are monozygotic, meaning that they develop from one zygote that splits and forms two embryos. Fraternal twins are dizygotic because they develop from two separate oocytes (egg cells) that are fertilized by two separate sperm.
The identical and fraternal twins graduated from Pollard Middle School in Needham, Massachusetts, on Wednesday. Another student, who is also a twin, graduated but her brother attends a different ...
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