this argument is nonsensical, because science does not exist to prove or disprove philosophical concepts such as personhood. What these scientific data show is that the zygote/embryo/fetus is indeed ALIVE and GENETICALLY HUMAN. I know of no pro-choicer that disputes this and it is not necessary for us to do so because it does not follow that because something is alive or genetically human, it is a person. Many things are alive that many or most who oppose abortion have no issue with killing.
If you have ever eaten meat, killed a spider or set a mousetrap, sprayed for weeds (or even eaten food that was grown using pesticides and herbicides) you have taken part in, or supported, the destruction of life. Many of the things we do on a daily basis as humans rely on the destruction of SOME sort of life so it is not enough to argue against abortion on the basis that the fetus is alive.
As for the fetus being genetically human, human tumors and cell cultures are also genetically human–AND alive as well, of course. Clearly the mere presence of human DNA does not confer a special moral status and why should it? Why should a human embryo which does not have thoughts, feelings, and experiences etc. be considered to have more moral worth than, say, an elephant which has all those things but lacks human DNA? Why should a non-sentient, genetically human organism be more valued than a sentient, genetically non-human organism? The only argument I can think of is the argument that humans are unique and set apart from other living things because they are specially created in the image of God. However, if you employ this argument, you have obviously backslid into religious arguments, which have no place in policy-making. There is no sound, non-religious argument that human DNA confers innate moral superiority.
The key issue is not life or humanity but personhood and this is not a concept that can be explored by science. It is a philosophical, moral concept that is usually defined by sentience–such things as self-awareness, the presence of feelings, thoughts, experiences, goals, values etc.