There are always new oddities to be discovered in Science. Researchers have now identified a second set of twins (this time before birth) who are neither identical nor fraternal (https://www.theguardian.com/science/2019/feb/27/scientists-stunned-discovery-semi-identical-twins). The boy and girl who shared a placenta, are sesquizygotic, as established by genetic studies of their embryological membranes, being the result of 2 sperm fertilising a single egg. The surviving products of the fertilisation essentially receive identical maternal but different paternal genes.
This blog may help people explore some of the 'hidden' issues involved in certain media treatments of environmental and scientific issues. Using personal digital images, it's also intended to emphasise seasonal (and other) changes in natural history of the Swansea (South Wales) area. The material should help participants in field-based modules and people generally interested in the natural world. The views are wholly those of the author.
Friday, 1 March 2019
Semi Same
There are always new oddities to be discovered in Science. Researchers have now identified a second set of twins (this time before birth) who are neither identical nor fraternal (https://www.theguardian.com/science/2019/feb/27/scientists-stunned-discovery-semi-identical-twins). The boy and girl who shared a placenta, are sesquizygotic, as established by genetic studies of their embryological membranes, being the result of 2 sperm fertilising a single egg. The surviving products of the fertilisation essentially receive identical maternal but different paternal genes.
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