Population genetics is the mathematical investigation of the changes in the genetic structure of populations brought about by selection, mutation, inbreeding, migration, and other phenomena, together with those random changes deriving from chance events. These changes are the basic components of evolutionary progress, and an understanding of their effect is therefore necessary for an informed discussion of the reasons for and nature of evolution. It would, however, be wrong to pretend that a mathematical theory, depending as it must on a large number of simplifying assump tions, should be accepted unreservedly and that its conclusions should be accepted uncritically. No-one would pretend that in the event of disagreement between observation and mathematical prediction, the discrepancy is due to anything other than the inadequacy of the mathematical treatment. The biological world is, of course, far too complex for the study of population genetics to be simply a branch of applied mathematics, so that while we are concerned here with the mathematical theory, I have tried to indicate which of our results should continue to apply in a context wider than that in which they are formally derived. The difficulties involved in the joint discussions of mathematical and genetical problems are obvious enough. I have tried to aim this book rather more at the mathematician than at the geneticist, and for this reason a brief glossary of common genetical terms is included.
DISCUSSION The LPS that is normally present on the surface of S. typhimurium apparently acts as a partial barrier to the ... of the earlier work on this project , and to J. R. Roth and P. E. Hartman for helpful discussions and strains .
MUSEUMS The following is a list of museums with film programs , compiled from the Official Museum Directory ( Washington , D.C .: American Association of Museums , 1975 ) . Check the " Weekend ” section on Friday in The Washington Post ...
Principles of Medical Genetics
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基因改造,可以剔走色盲、不育、腫瘤和肌肉萎縮等疾病,是重要發明! 基因改造成功了,可以產生健康又長壽的特種新人類, ...
Explains the science behind modern treatments. Examines the impact on society and discusses the moral issues at stake.
为了解决这个问题,张进团队在“鸡蛋”还没有受精前进行细胞核移植,这种做法从技术上看是领先的,同时从伦理道德上也相对容易被接受。具体操作过程为,医生先移除Shaban的卵子原核,再植入同被去除卵子原核的捐赠者卵子内,然后授精。张进团队以这种方法, ...
This third edition of Human Molecular Genetics continues to provide a clear introduction to this complex and fast moving field. Now updated and revised throughout, the material covered...
Key Benefit: Known for its focus on problem-solving, conceptual understanding, and practical applications, this best-seller is 32 pages shorter than its previous edition. New features of the Seventh Edition...
The genetics revolution that began with the discovery of DNA fifty years ago has transformed the science of biology. It has given us unprecedented power over life itself in the...