Download Agro-Technology: A Philosophical Introduction (Cambridge by R. Paul Thompson PDF

By R. Paul Thompson

People were editing crops and animals for millennia. The sunrise of molecular genetics, even if, has kindled extreme public scrutiny and controversy. plants, and the foodstuff items which come with them, have ruled molecular amendment in agriculture. companies have made unsubstantiated claims and scare mongering is usual. during this textbook Paul Thompson offers a transparent account of the numerous matters - deciding on harms and advantages, analysing and coping with hazard - which lie underneath the cacophony of public controversy. His complete research seems specifically at genetically changed organisms, and contains a proof of the medical heritage, an research of ideological objections, a dialogue of felony and moral matters, a urged substitute - natural agriculture - and an exam of the controversy's effect on sub-Saharan African nations. His e-book should be of curiosity to scholars and different readers in philosophy, biology, biotechnology and public coverage.

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Extra resources for Agro-Technology: A Philosophical Introduction (Cambridge Introductions to Philosophy and Biology)

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Meiosis results in four cells, the nuclei of which have only one set of the original matched pair of chromosomes. These cells are called gametes; human sperm and ova are gametes. During the process of fertilisation gametes from males and females combine to create a new single cell, the nucleus of which has a complete set of matched pairs of chromosomes; normally this cell undergoes mitotic division numerous times, resulting in a mass of identical cells. g. heart, liver and skin cells). Once transformed, further mitotic division produces only the specific type of cell it has become.

Crick sent a letter to Nature setting out their conception of the molecular structure of deoxyribose nucleic acid (DNA: now more frequently cited as deoxyribonucleic acid) (Watson and Crick, 1953a). A longer article by Watson and Crick exploring the implications of the structure of DNA was published in Nature the following month (Watson and Crick, 1953b). Since Watson and Crick submitted the letter and paper to Nature, they are credited with the actual discovery. However, the 1962 Nobel Prize in physiology or medicine was awarded to Watson, Crick and Maurice Wilkins.

Hardy and Wilhelm Weinberg demonstrated was that in every generation after the first, the proportion of alleles at a locus, in a closed population, will be the same – an equilibrium will be reached. g. more gametes with XX chromosomes (female) than XY chromosomes (male) are produced during meiosis) and so on. What the Hardy–Weinberg equilibrium states is that if nothing happens, nothing happens. This might seem trite (perhaps even ridiculous) but, in fact, it is a powerful principle. Since they proved that if nothing, except random mating, is occurring in the population, the allelic ratios will remain constant over time, if there is a change in the ratios, something must be happening to cause the change; there must be an explanation in terms of some factor(s) perturbing the system.

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