Examining each twin’s DNA will reveal whether they are identical or fraternal; fraternals also normally have separate amniotic sacs, as well as separate placentas. Are boy-girl twins always ...

Examining each twin’s DNA will reveal whether they are identical or fraternal; fraternals also normally have separate amniotic sacs, as well as separate placentas. Are boy-girl twins always ...

Despite their genetic similarities, identical twins are not perfect replicas of one other. Despite their virtually similar ...

But they share only a proportion of their father's DNA - placing them, genetically, somewhere between fraternal and identical twins. Experts say the phenomenon is extremely rare - embryos such as ...

This story appears in the January 2012 issue of National Geographic magazine. Every summer, on the first weekend in August, thousands of twins converge on Twinsburg, Ohio, a small town southeast ...

Fraternal twins: Identical twins: There's another, extremely rare type of twins called semi-identical (sesquiszygous) twins, who share more than half but less than all their DNA. Semi-identical ...

A PAIR of identical twins have revealed that they have twin telepathy, and shared the sticky situation they always use it in. Liz and Rose Conway, 27, are constantly getting mistaken for each ...

of fraternal twins and these include: Family history. If the women in your genetic family have a history of fraternal twins then it increases your risk. Age. The chance of twins rises with ...

The DNA results have also revealed that Rosemary ... Melvis Imbaya, who has been living with Melon as fraternal twins in Kakamega County, has been confirmed to be the daughter of Angeline Omina ...

Test batteries that include psychometric measures of cognitive and academic abilities and processing speed (Project I), word reading, writing, and phonological processes (Project II), ADHD and ...