Semi-identical twins discovered
This is interesting in many areas, including the topics of twins, hermaphrodites, and nuances (mistakes?) of conception. An excerpt from a Nature.com article, published March 26, reads:
Researchers have discovered a pair of twins who are identical through their mother’s side, but share only half their genes on their father’s side.
The ‘semi-identical’ twins are the result of two sperm cells fusing with a single egg – a previously unreported way for twins to come about, say the team that made the finding. The twins are chimaeras, meaning that their cells are not genetically uniform. Each sperm has contributed genes to each child….
“Their similarity is somewhere between identical and fraternal twins,” says geneticist Vivienne Souter, of the Banner Good Samaritan Medical Center in Phoenix, Arizona. “It makes me wonder whether the current classification of twins is an oversimplification.”
Such twins are probably very rare…. [A]n egg fertilized by two sperm develops into a viable embryo….
“There’s value in understanding that this can happen, but it’s extremely unlikely that we’ll ever see another case,” says Charles Boklage, an expert on twinning who works at Eastern Carolina University in Greenville, North Carolina.
Souter and her colleagues investigated the twins’ genetic makeup because one was born with ambiguous genitalia. This twin turned out to be a ‘true hermaphrodite’, with both ovarian and testicular tissue. The other twin is anatomically male.
Genetic tests revealed that each twin contained some ‘female’ cells with two X chromosomes, and some ‘male’ cells with an X and a Y. The proportion of each type varies from tissue to tissue in each twin, the researchers report in Human Genetics1.
The babies, now toddlers, were conceived and born normally, and each twin’s growth and mental abilities appear normal….
“The number of these cases is very small, but before they were reported, most people would have said this could never happen,” says geneticist David Bonthron of the University of Leeds, UK.
Jill Stanek is a nurse turned speaker, columnist and blogger, a national figure in the effort to protect both preborn and postborn innocent human life.
Another new type of human organism has been discovered, whom the pro-aborts will try to kill.
In recognizing human status of those individuals resulting from triploid zygotes, events of chromosomal non-disjunction, or other anomalies, our descriptions of human development continue to be attacked by those needing an excuse to kill humans.
It’s a good idea for prolifers to prepare themselves intellectually to counter the efforts of people who look upon genetic anomalies as reasons to kill.
Thanks to Jill Stanek for spotlighting this news.
“In recognizing human status of those individuals resulting from triploid zygotes”
You are aware that this simply does not exist in nature. Trisomy-21 is tolerated, as is trisomy-13, altho not as successfully. A trisomy of every chromosome will result in a very quick termination. As well, trisomy is the result of nondisjunction, except in the event of translocation, as with familial Down Syndrome.
This is taken directly from the article:
“There’s value in understanding that this can happen, but it’s extremely unlikely that we’ll ever see another case,”
Why would you suppose that abortion would be advocated in cases of genetic anomalies from which medicinal knowledge can advance? Pro-choice people dont like abortion; we just dont think the rights of a fetus superceed the rights of its mother. If you find a person who is truly pro-abortion–that is, in support of termination unconditionally–then you will be justified in giving him this title.
Samantha, you’re such a typical pro-deather. The only value you see in not aborting defective humans is for the sake of research.
“The only value you see in not aborting defective humans is for the sake of research.”
You make very broad generalizations when you have no just cause for doing so. If not for abnormal genetic phenotyopes, the mechanisms of genotypic variation would be unknown and treatment would be impossible. I think its fascinating that you continue to refer to me as a “pro-deather” when I advocate the types of advancements that will lead to happier, healthier lives for many human beings. I also should point out the fact that I personally do not consider any human defective. Im disturbed
that you would refer to a person in that manner.
Samantha, big words, all to say, “Don’t look at that man behind the curtain.”
How interesting. Years ago a co-worker of mine, a woman now in her seventies, told me her parents and their doctor theorized that she and her twin sister were the result of a single egg being fertilized by two sperm. I really don’t know why they thought this but obviously this “discovery” was being theorized on long before now.
SamanthaT:
W-I-C-K-E-D. Woman In Confused Knowledge Edifying Death. That’s you.
As you so eloquently stated, similarly, Hitler “advocated the types of advancements that he thought would lead to happier, healthier lives for many human beings.”
At least Hitler had a murderous propagandist named Joseph Goebbels spew his hatred for life. While really anonymous, and therefore cowardly, your hatred is no less putrid and no less damning.
My Lord, what happened to you to make the life of an innocent human being so worthless in your eyes, clothed in women’s rights? It’s such a sham. Can’t you see the darkness in your soul? Please wake up before it’s too late.
Call me archaic, bigoted, hateful, etc., etc. Should I soend any more time on you or leave you to your own devices and give up? I think you’re worth saving but you’ve got to listen. Let me know.
sigh….
Samantha, please look up the word ‘zygote’ then read the referenced article.
The apparent fusion of two sperm cells and a secondary oocyte described in the article is said to have resulted in a triploid zygote, which then gave rise to the two chimaeric, semi-identical twins.
In other words, the formation of a triploid zygote is the mechanistic explanation for the resultant semi-identical twins.
kbrauer