Over many generations, the accumulation of these beneficial genetictraitsmay result in a change in the population known as evolution. 自然选择的作用我们现在用“最适者生存”(survival of the fittest)来总结,这里的fittest不是最强的意思,而是在某个生境下面最适合的意思。Adaptations develop over time throug...
We used extensive data from a long-term study of great tits ( Parus major ) in the United Kingdom and Netherlands to better understand how genetic signatures of selection translate into variation in fitness and phenotypes. We found that genomic regions under differential selection contained candidate...
根据第一段Natural selection is the process by which one type of animal within a species thrives because of certain characteristics that make it more likely to live than others in its group.可知,自然选择是一种过程,在这个过程中一种动物有使它比其他群体更有可能活下去的某些特征而能够更多地繁衍生息...
So far, we've looked at natural selection as an agent of change. When we look around the world, however, we see many animals that have remained relatively unchanged for tens of thousands of years — in some cases, even millions of years.Sharksare one example. It turns out that natural ...
In 19th century England, certain types of peppered moths were able to better blend(融合)into their surroundings. During that time period, great changes were happening in Great Britain. The Industrial Revolution was part of this change, and with it came air pollution. Natural selection often takes...
2012b . Natural selection. V. How to read the fundamental equations of evolutionary change in terms of information theory . J. Evol. Biol. 25 : 2377 – 2396 .S. A. Frank, "Natural selection. V. How to read the fundamental equations of evolutionary change in terms of information theory,...
variability; and in the foregoing case the conditions of life are supposed to have undergone a change, and this would manifestly be favourable to natural selection, by giving a better chance of profitable variations occurring; and unless profitable variations do occur, natural selection can do ...
Natural selection and random genetic drift as causes of evolution on islands The evolutionary processes responsible for adaptation and speciation on islands differ in several ways from those on the mainland. Most attention has been given to the random genetic drift that arises when a population is ...
in genetic diversity during long-term mass rearing. However, compared to the putatively neutral synonymous sites, those functionally important sites (such as nonsynonymous sites) in wild populations are likely to be preserved by natural selection. We demonstrate that natural selection maintains the gene...
What causes allele frequencies to change across generations? How does it relate to natural selection, sexual selection, genetic drift, and migration? Hardy-Weinberg Equilibrium: Hardy-Weinberg equilibrium determines the state of balance of g...