Perhaps a good scientific definition of when a human life begins is when cells unite to form a completely unique individual complete with its own set of genes that are completely unique.
Perhaps a good scientific definition of when a human life begins is when cells unite to form a completely unique individual complete with its own set of genes that are completely unique.
Well, I tried. As I said, though, I am an amateur scientist in about any science except the science of fire.But then monozygotic twins will never be living humans :-(
You sure do ask a lot!
Well, I tried. As I said, though, I am an amateur scientist in about any science except the science of fire.![]()
According to an awful lot of authorities on the issue Joey isn't even close.From New Scientist magazine
An international poll has shown there's a wide range of opinion about when human life "begins" biologically.
The results foreshadow voting on a controversial constitutional amendment next week in Colorado to confer legal rights on embryos at the point of fertilisation.
A "yes" vote could make it easier to outlaw abortion in that state, and encourage similar amendments to be tabled elsewhere in the US.
But in the international poll, only 22.7% of voters selected fertilisation as the point when human life begins. Detection of fetal heartbeat came highest, polling 23.5% of the 650 or so votes. Implantation of the embryo in the womb lining came third, with 15%.
Respondents were given a dozen possible tick-box answers, and and asked to tick the one they agreed with.
"We can't tell [Colorado] voters the right or wrong answer, because our results suggest there isn't one," says Jaclyn Friedman of Reproductive Biology Associates, the IVF clinic in Atlanta, Georgia, which commissioned the poll.
Friedman also stresses that the poll question asked respondents when human life began in a biological sense of being an original entity.
"We didn't ask when it's a person," she says. "There's a distinction between when a group of cells is considered living, and when it deserves human rights, and that's what comes into play with this amendment."
The amendment proposes not only that fertilisation is when human life begins, but also that this is when someone becomes a person, deserving the same legal rights and protection under the American Constitution as any baby, child or adult citizen.
"People might say this or that is when life begins, but it doesn't necessarily confer legal rights on that entity," says Thomas Elliott of Reproductive Biology Associates, who will present the full results of the poll next week in San Francisco at the Annual meeting of the American Society for Reproductive Medicine.
The poll also demonstrates the wide religious and geographic spread of opinion on when biological life begins.
Not surprisingly, Roman Catholics had the highest proportion voting for "sperm-egg" fusion, around 31%. By contrast, a third of Jewish respondents, 29% of agnostics and 27% of Muslims opted for fetal heartbeat. So too did 38% of IVF patients.
Geographically, only 13% of UK respondents opted for "sperm-fusion", with 43% choosing "fetal heartbeat". In complete contrast, 47% of Australasians voted for "sperm-egg" and a tiny 7% for "fetal heartbeat".
The spread in North America was more even, with 27% choosing "sperm-egg", 24% "fetal heartbeat" and 18% "implantation".
Perhaps. But how does that make it a life? A swamp or wetland has its own biochemistry. Does that mean that it is alive? There is no single, simple definition of life.
Yes. And what it doesn't, the mother's system provide.I think so. And the embryo fulfills all these conditions, right from the birth? When it is two or four cells, it has all this?
Yes, it is. When one cell splits, it is directed by nucleic acids. That is biochemistry. Biochemistry is the science of chemical reactions governing life. That is the point...Again, at what point does its have its own biochemistry? It can’t be from the moment of conception.
So? You just admitted the embryo is alive. It's definitely Homo sapien.Same could be said of say, a one month embryo. Its individual cells can remain alive, but the embryo cannot, outside mother’s body.
There may not be a simple answer, but there are some answers, some with more merit than others.That is right, you may, but I don’t know. When life begins is a very complex question, there is no simple answer. Scientists rightly stay away from the subject.
Amongst biologists, there are competing views. Embryological (life begins at gastrulation), metabolic (no single defining moment, a smooth gradual process, even fertilization can take up to one day to complete), genetic (Les pretty much posted this already with the meeting of genetic material and the creation of a unique new genotype), neurological (related to classifying death, brain death, cardiac death, so life in this sense begins when there is a distinct EEG pattern), and humanities (when the person acquires human qualities, what are these anyways...)There is no denial here, Tonington. When there is a scientific consensus that life begins at conception, I will believe it. In matters of science, I defer to scientists, in this case biologists (I am a physical scientist, not a biologist).
Inactive DNA. Inactive organs. Tissues can remain active because the cells that make them up have their own stored energy (glycogen) and there are still sufficient solutes in the cytosol and extra-cellular fluid to allow pumps, nervous impulses, and other minor cell functions to continue.But the dead body also has DNA, the cells in the dead body have DNA. DNA tells us it is human if it is alive. However, DNA by itself does not tell us if it is alive or not.
Oh, so you agree that it cannot provide everything it needs, do you?
I agree with you here. But again, I come back to my point, what kind of life. The fact that there is biochemistry means that the individual cells are alive, that does not necessarily mean that the organism is alive. Does the organism have a consciousness? We again come back to the analogy of dead body. Biochemical activity by individual cells does not necessarily indicate life at a higher level.
Not at all, Tonignton. I have already said that individual cells in the embryo may be considered alive. But is the embryo alive? That is a difficult question.
I am pro choice as well. Then what are we arguing about? These are very complex, nebulous issues; I think we are just discussing how many angels can dance on the tip of a needle. And I am not a biologist (as I said before, I am a physical scientist), so I really couldn’t say that I am genetic, metabolic etc or any kind of hybrid.
The power the Holy Spirit gives the Church is the truth. Truth is the ultimate power because it is reality. “Men may all lie, but God is always true” (Romans 3:4). Truth always wins, in the long run. In the short run it may seem that lies win. But truth sustains life while falsehood destroys it. Jesus said that Satan “was a murderer from the beginning, and does not stand in the truth, because there is no truth in him. Whenever he speaks a lie, he speaks from his own nature; for he is a liar, and the father of lies” (John 8:44). Lies do have power, but it is a fatal power and eventually self-destructs. In our society there are lies that an unborn baby is not human, and that marriage is not naturally the union of male and female, and that truth is only opinion. When a society accepts these lies, it eventually clashes with inescapable reality and crumbles. Even Satan is forced to tell the truth in the presence of Christ: “I know who you are, the Holy One of God” (Mark 1:24).
It's about legal issues and it's about serious health matters. The rest of it is pure irrelevant bs.