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#311299 - 02/28/19 11:58 PM Scientists stunned by discovery of 'semi-identical' twins
Golem Offline
enthusiast

Registered: 03/12/12
Posts: 3833
Loc: Orange County, California, USA
Nicola Davis
The Guardian
February 27, 2019

Quote:
Boy and girl, now four, are only the second case of ‘sesquizygotic’ twins recorded

A pair of twins have stunned researchers after it emerged that they are neither identical nor fraternal – but something in between.

The team say the boy and girl, now four years old, are the second case of semi-identical twins ever recorded, and the first to be spotted while the mother was pregnant.

The situation was a surprise to the researchers. An ultrasound of the 28-year old mother at six weeks suggested the twins were identical – with signs including a shared placenta. But it soon became clear all was not as it seemed.

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#311318 - 03/01/19 10:34 PM Re: Scientists stunned by discovery of 'semi-identical' twins [Re: Golem]
pondering_it_all Offline
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Registered: 02/27/06
Posts: 8309
Loc: North San Diego County
Interesting. In a genetics class, I once found a chimera fruit fly: It was male on the left side and female on the right side!

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#311321 - 03/01/19 10:45 PM Re: Scientists stunned by discovery of 'semi-identical' twins [Re: pondering_it_all]
Golem Offline
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Registered: 03/12/12
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Originally Posted By: pondering_it_all
Interesting. In a genetics class, I once found a chimera fruit fly: It was male on the left side and female on the right side!

Meet He-She, the most unsung comic book villain ever

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#311322 - 03/01/19 10:46 PM Re: Scientists stunned by discovery of 'semi-identical' twins [Re: pondering_it_all]
logtroll Offline
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Registered: 04/26/10
Posts: 8974
Loc: New Mexico (not old Mexico)
Originally Posted By: pondering_it_all
Interesting. In a genetics class, I once found a chimera fruit fly: It was male on the left side and female on the right side!

What was it on the in side?
_________________________
"You can't fix a problem until you understand what the problem is." Logtroll

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#311333 - 03/02/19 10:35 PM Re: Scientists stunned by discovery of 'semi-identical' twins [Re: Golem]
pondering_it_all Offline
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Registered: 02/27/06
Posts: 8309
Loc: North San Diego County
It was split right down the middle, so I assume something bad happened as it divided from one cell to two cells. So internally, it would be male on one side and female on the other. I think humans are sometimes chimeras, too. Different DNA in different parts of their bodies. My wife has a line right down her abdomenal midline and is distinctly darker on one side.

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