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mistake in Genogram Symbols on website?

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Author Identical twins cannot be of different gender
GenoProUser
Posted Sunday, September 10, 2023 - Post #43340
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Last Login: Sunday, September 10, 2023
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LS,

On the page https://genopro.com/articles/how-to-create-a-genogram/ is a basic presentation on the Genogram Symbols. At the right side of the figure explaining these symbols Identical Twins are shown. However, the symbol uses both a male and a female. In my understanding the gender of an identical twin is always the same, either male of female, never a combination.

With kind regards,
Mark

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GenoProSupport
Posted Thursday, September 14, 2023 - Post #43368
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GenoPro version: 3.1.0.1
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Wow, you are very sharp! One of our employee did the page and this error slipped through. I cannot find the original .gno file. We will fix it when we will retouch the page. Thanks again for reporting this error.
jfreilly
Posted Friday, February 7, 2025 - Post #46664
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It is super rare but identical twins can be of different sex, How? it is possible that genetic mutation occurs after the fertilized egg splits.

There is an explanation here which also explains that there are likely problems for one of the children which is tough.
https://www.alphabiolabs.co.uk/learning-centre/are-identical-twins-always-the-same-sex/#:~:text=In%20other%20words%2C%20identical%20twins,and%20one%20female%20identical%20twin.

Anyway this is just an FYI. I try to keep up with this kind of thing for work reasons.

Edited: Friday, February 7, 2025 by jfreilly



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