The reason religion is so powerful

[Mister Agenda]

It most certainly does. There are other symbiotic terms reserved for when the relationship isn't harmful, or beneficial: Commensalistic and Mutualistic.

Nope wrong

How so? Bearing in mind that the developing fetus definitely causes some harm and is a risk to its host.

---

What about the baby vs. the viable embryo in a tube?

I believe you are reading through the comments so you might have seen my answer by now. I would choose the baby, but I think the reason I would do so is because of an evolutionary predisposition to do so.

You are right, I've been catching up. It's a fast-moving thread. My apologies.

---

Under such an assumption I think most people will show a measurable hesitancy in their choice. Take a look at the comments in this video (as well as watch the video itself). Being able to see an actual growing embryo definitely flips a switch in people's head. 

I think you have a point. But will it flip anyone to saving the embryo instead of the baby?

---

Take it up with Neo, who is the one claiming it's genetics that makes something human.

Unless I missed something, all Neo said was that the unborn were human from conception. That's not the same as "its genetics that makes makes something human." That appears to be a strawman you are using to make comments about "cheek scrapings."

Neo's reasoning was that the embryo is biologically human from conception. Any undamaged human cell is biologically human. Being biologically human doesn't make something a human being.