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246 pages, Paperback
First published March 29, 2016
Host eggs with their original nucleus removed still contain something called mitochondria, literally 'grain-like threads' in ancient Greek. These threads are frequently referred to as the powerhouse of the cell; they fuel cellular processes and, when dysfunctional, can cripple the body.
More important for us, human mitochondria contain 37 human genes, which a cloned embryo would inherit. So, given that humans have between twenty-thousand and twenty-five thousand genes, it would seem the statement that a clone's genes come from just one person is 99.9% accurate (or, more precisely, 99.9815% correct). (p61)
Other objections to human cloning, those based on safety, unnaturalness, and harm to society, may actually mask religious unease. By far, the major source of all objections to human cloning is the idea that God makes babies, and that only God, not humans, should decide how and when babies come... (p26)
... Even if we understand genetics and how each parent contributes twenty-three chromosomes, including one sex chromosome, to the sexually created child, and even if we understand how the genetic roulette wheel mixes the genes of mother and father to create a new, unique child, we can still believe that the hidden hand of God guides the genetic mixer.
But in cloning, such belief wanes in credibility. Human beings choose to clone the genotype of a modern Leonardo da Vinci and not those of their neighbours, and that choice brings conscious human wants and decisions to the foreground. (Of course, if you believe God gave humans a brain to think and choose with, cloning doesn't threaten you at all - but such theists seem both to be in the tiny minority and uninterested in control of public policy.)
Why, I can't help wonder, should human choices about cloning be so feared and not those about, say, riding motorcycles, eating junk food, or not finishing college? (p27)