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新西兰留学生作业代写:现代进化综合

自然选择与20世纪“现代进化综合”相关的另一个证据与t·h·摩根(T. H. Morgan)对黑腹果蝇的研究有关。自然选择的概念帮助建立了染色体遗传理论和孟德尔遗传学理论之间的关系,孟德尔遗传学理论认为,突变不是一步一步创造物种,而是在不同的种群中创造不同的基因构成。现代进化论的其他进展与w·d·汉密尔顿(W. D. Hamilton)和约翰·梅纳德·史密斯(John Maynard Smith)的研究工作有关,他们在20世纪60年代中期提出了以基因为中心的进化论观点。这种综合增加了达尔文的自然选择理论的范围,从而包括了随后的科学进步,包括遗传学和DNA分析。植物学家G. Ledyard Stebbins的工作,是自然选择与“现代进化综合”的另一个最重要的贡献者(清醒,1984)。他的工作扩展了自然选择的概念,在自然选择中,多倍体和杂交的结果显示,双杂交涉及两个没有交叉的基因的连锁。在配子形成过程中,来自基因的等位基因以一种独立的方式进行组合。

新西兰留学生作业代写:现代进化综合

Another evidence of natural selection in relation to “Modern Evolutionary Synthesis” Of the 20th Century relates to T. H. Morgan research work on Drosophila melanogaster. The concept of Natural Selection has helped establish a relationship between Chromosomal Theory of Inheritance and the Mendelian Theory Genetics, which has established that instead of mutations creating species in single steps, it creates variations in genetic makeup that varies among populations.Other modern evolution advances relates to research works of W. D. Hamilton and John Maynard Smith, which have led to development of Gene-Centric View of Evolution in the mid 1960s. This synthesis has increased the extent of Darwinian Theory of Natural Selection to include consequent scientific advances that include genetics and DNA analysis. The work of G. Ledyard Stebbins, a botanist, is another most important contributor to the natural selection in relation to “Modern Evolutionary Synthesis” (Sober, 1984). His work has extended the concept of natural selection where the effects of polyploidy and hybridization shows dihybrid cross involving linkage of two genes which have no crossing over. From the Law of Independent Assortment, alleles from genes assort in an independent manner during formation of the gametes.

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