Despite your clone example, DNA is not everything. If a mammalian blastocyst is grown in a petri dish, the longest it survives appears to be a doubling of its pre-implantation lifespan if fed with a supernutrient. For a human embryo, that would be maximum 16-20 days. So the very continuation of life of a human embryo is not a result of its DNA.
DNA does not uniquely determine phenotypic sex, because the hormonal environment in the uterus during the differentiation of sex organs from the seventh week can, in some cases, produce phenotypic males from genotypic females and phenotypic females from genotypic males. The sex of a fetus and the sex of a newborn are usually decided by phenotypic appearance, not a DNA test, and this can result (and has resulted) in ignorance of the genotypic sex of a child for years, so that the child is raised on the basis of phenotypic attribution.
DNA does not uniquely determine whether and where a blastocyst implants, whether an embryo is sufficiently incompatible with its environment to fail to develop properly, and a host of other things.
The fetuses of pregnant women who took the drug thalidomide were born with many defects - failure to develop limbs, malformation of genitals and kidneys, and many other effects.
Aspartame (in artificial sweeteners and even corn oil) and MSG can cause brain damage in fetal development resulting in newborns with mental retardation, cerebral palsy, autism, brain tumors, ADD, etc. Aspartame can damage the DNA of a fetus permanently.
Even one dose of certain cough medicines taken by a pregnant woman can cause birth defects and/or fetal death.
The mercury in silver amalgam dental fillings and some fish or even a flu shot could cause mercury toxicity in a fetus and permanent neurological problems.
Flouride, especially when combined with aluminum, even from heating flouridated water in aluminum pans, can if imbibed by a pregnant woman can affect fetal development so as to cause lower IQ and increases the risk of Down syndrome.
Too many ultrasounds are associated with fetal development of brain damage.
And various ordinary foods, unripe papaya and caffeine-rich drinks, for example, can cause miscarriages.
All that is just stuff a woman can put into herself that can affect the embryo/fetus in fundamental ways. Her own body also has distinctive chemical characteristics, and if you imagine they cannot affect the embryo/fetus in fundamental ways, you're crazy.
So your overemphasis on DNA results in your ignoring a tremendous set of factors which interact with and in some cases even permanently damage embryonic/fetal DNA itself. Do you think a woman's body is a passive sanitary container? Put a human zygote in a petri dish and it will die before it develops various basic human phenotypic characteristics.
Isn't that the reason why everyone wants to force women to gestate embryos/fetuses instead of just asking if it's okay to remove blastocysts before they implant?
But you are obviously wrong.
Petri dish isn't exactly the natural environment for gestating a baby. Not even close. Feeding it with a supernutrient isn't going to cut the mustard. It is always going to be either overfeeding certain nutrients which could become toxic or undernourishing or complete lacking in one essential nutrient or the other. Homeostatic regulation of pH and temperature and homonal balance are another missing equation. In essence, there is no mutual regulations and feed back of any kind in the petri dish as in the case between the gestating mother and the baby.
Beside the problem of space for growth and development as found in the elastic expansion of the uterine wall and the amniotic sac to accomodate development, as the embryo grows in size it needs a system such as a placenta to bring in not only the nutrients but also the oxygen it needs for further development as it begins to differentiate into tissues and organs. But, most importantly it has to have a way to get rid of its own wastes. Otherwise, it is going to die in its own waste as is what happened in the petri dish.
So, therefore, you are confusing the environment's shortfall for faulting the DNA.
You said: "... the very continuation of life of a human embryo is not a result of its DNA." But again you are completely wrong.
The fact is, not only the very continuation of life of a human embryo is the result of DNA expression, but also the very continuaiton of life and our thought processes and motor movement throughout all human lifespan and development from conception to adulthood to the moment of death is the result of our DNA expression.
You see, everytime you think, your brain cells have to unzip a portion of your DNA to transcribe the pertinent genes into RNA in order to translate it into amino acid sequence to form a protein to act as a neurotransmitter. And everytime you move your muscles for heartbeat, for breathing, for eating, for walking to get something to eat, your neurons have to go to your DNA to get the genetic instruction on how to assemble the right amino acid sequence to form the appropriote neurotransmitters to get the muscles to do what they are called to do for your very survival.
Even when you eat, the cells in your digestive tract have to produce various complex enzymes and acids to breakdown the foods you eat to get to the nutrients. What are enzymes? They are proteins that build or break down molecules for your body to build itself and perform all the physiologic and metabolic functions. Even your eyes and ears need depend constantly on the genetic instructions contained in your DNA for them to see and hear things around you.
Just about everything you do, including the ability to reproduce into the next generation involve your DNA. Take away all the DNA from every cells of your body and you will be dead immediately. So, you see, ignorance is a bliss. But, do count your blessings that come in so many way without you knowing it.
You are wrong when you said: "DNA does not uniquely determine phenotypic sex".
Nothing in the body isn't regulated by DNA. Every metabolic and endocrine functions are regulated by DNA through the feedback system. What you just described regarding development of "phenotypic males from genotypic females" is exactly the example of DNA determining phenotypic sex.
In the above situation, the DNA of a genotypic females could have a genetic error caused by a mutation that renders a key enzyme called aromatase that convert Androstenedione and Testosterone into Estrone and Estradiol. Without the key enzyme, Estrogen is not produced and thus the fetus ended up with the male sex hormones which are the default hormones.
The result is the phenotypic males of a genotypic females. In some situation, a minor genetic mutation in the DNA can cause fatal harm then just altering your phenotypic gender expression. So, you see how important your DNA is?
The rest of your argument about mercury, the thalidomide drugs, Down syndrowns are simply the same, i.e. damage from environment that damaged the DNA. Which goes to show you how extremely important DNA is that make you what you are, who you are and how you look like. As you can see, children who were born to women who took the thalidomide drugs were deformed without arms and legs. To you pro-abortion folks, if it ain't look exactly like a fully formed human being then it ain't a human being. So, what are you complaining about if you don't believe DNA is all that contributed to what you are and who you are?
So all you did was pointing out all the damaging environmental factors that damaged the DNA that resulted in all the problems your outlined. But, somehow you failed to see that your own argument highlighted the tremendous importance of DNA that shape our body and our life.
And for you to say I have overemphasized on DNA is an understatement. Nobody can overemphasize the role of DNA and how important it is because there are tremendous amount of biochemical roles our DNA caused to perform, maintain and regulate in our body after it has caused the body to be built from ground zero up at conception. Even now, no scientist has completely uncovered all the roles and functions DNA does for our body and our life.
Be happy you don't have to know it all about how your body work microscopically in every detail in order to regulate your own body. Afterall, DNA does it for you as you breathe and as you sleep to keep everything together in good order, even down to regulating your blood sugar. But, don't fault DNA if man-made environmental agents caused it to malfunction. Until then, you will never appreciate what good life you have.
Meantime, you will condemn another class of human beings as dispensable simply because they happened to reside in their mothers' wombs for the time being as you yourself did the same once before.