Heredity and Development Second Edition (1972) / Chapter Skim
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CONCEPTS IN GENETICS
CONCEPTS IN GENETICS
Pages 1-6
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The zygote contains all the instructions required to produce another human being. Shortly after its formation, the zygote undergoes a series of changes that leads, if its luck holds, to an adult.
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Classical genetics was essentially complete by 1930. It was in a state similar to that of physics in 1899, when A.A.Michelson said, The more important fundamental laws and facts of physical science have all been discovered, and these are now so firmly established that the possibility of their ever being supplanted in consequence of new discoveries is exceedingly remote….
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The same procedure is fol lowed to explain these and so successive phenomena become under standable and organized into the ever-growing body of scientific knowledge. At least that is the way that science is thought to work.
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When we do this we select the experiments, observations, and ideas that subsequent events have shown to be correct and, not surprisingly, we ignore the inadequate experiments, incorrect observations, and faulty ideas. We shall attempt, therefore, to describe the progress of genetics as it took place and in so doing try to understand some of the problems facing scientists who are working on unknown phenomena.
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