Group selection

An Overview of the Determinant of the Genomic Diversity Genetic diversity provides variation in which that selection can act upon and it determines the response of population towards environmental change. Therefore, knowledge in genetic diversity is crucial for developing breeding strategies and also for the management of endangered species. Understanding the determinant genetic diversity is also essential for resolving the long-standing riddle in population genetics, the disproportionately…

When asked if you know the meaning of Natural Selection can act only by the preservation and accumulation of infinitesimally small inherited modifications, each profitable to the preserved being it makes you confused. This is what Darwin’s contemporaries felt while reading his theory about natural selection. This is what they needed to read in order to understand. More individuals are produced each generation that can survive. People who lived back in the mid 1800’s did not understand where…

changing conditions of life, to her living products?” This key question that Darwin poses in his chapter “Recapitulation and Conclusion” helps to exemplify the ideas that he conveys regarding natural selection and “descent with modification.” Darwin distinguishes between artificial and natural selection early on in his chapter. He states that, while humans do not produce variation directly, they do manipulate the variations already in nature for their own benefit. Purposeful manipulations of…

One of the five agents of microevolution is natural selection. It influences changes in gene frequencies in a population. Natural selection is defined as a process in which there is a competition to pass on genes. In natural selection, some traits are more favoured than other traits. This may result in changes in a population. The favoured traits become more common compared to the traits that are not favoured. The favoured traits are based upon on the environmental conditions. When certain…

providing evidence that they were beneficial and perhaps essential to some groups in the past, and that they might have implications on the health and survival of certain human populations today and in the future. There is extensive evidence supporting the hypothesis that blood types are long-lived…

the evolution of biological species this is according to the Sage’s English dictionary and thesaurus. It is the continuous change in the genes of an existing specie until a formation of the new specie arise altogether. It is a result of two specie groups ceasing to share allele such that the genetic differences grow to the point of speciation. Many scientists have come up with different theories in an attempt to define and explain speciation, though different they all agree that for an organism…

changes that occur randomly in the frequency of alleles which impact populations of many species. These also lead to effects such as bottle neck and founders effect. Natural Selection revolves around the concept of fitness which basically means to survive and pass on your genes to the next generations. Further natural selection has four principles which include variation, heritability, the number of offsprings of people are greater than the available resources and finally, favourable…

small group moves from home to new settlements, this new family will have dissimilar allele frequencies from the original population it may be by chance either lack come alleles or have high frequency of others while population bottlenecks occurs when a large decrease in the size of an original population can eliminate a large amount of genes. 23. How does mutation increase genetic variation in a way that crossing over and independent assortment do not? This because during mutation selection…

or characteristics (Freeman et al., 2014, p. 5). The characteristics that change throughout a population over time are known as evolution (Freeman et al., 2014, p. 5). Natural selection is a process developed by Darwin and Wallace—which is used to explain how evolution happens (Freeman et al., 2014, p. 454). Natural selection can happen when either an individual in a population has heritable characteristics or…

development of new devices, the formation of new species, the progressive development of wildlife. Natural selection is the only factor that is acting in a heterogeneous population, directs the evolutionary process. According to Charles Darwin the premise of natural selection is the struggle for existence. From a modern point of view, through the struggle for existence, the mechanism of natural selection is carried out. The species is the basic structural unit of wildlife. It arises, develops,…