Page 1 of 42 - About 418 Essays
  • The Influence Of Genetic Variation

    Variation is the fuel that feeds evolutionary change and it originates at the levels of phenotype and genotype. Environments of organisms are greatly influenced by biotic factors such as predation and competition, but are also influenced by abiotic factors such as human activity and climate. In biology, disturbances are changes within environmental conditions that cause intense changes in ecosystems. Some organisms poorly suited for their local environment can respond adaptively by altering their phenotype to suit their location. We understand this as phenotypic plasticity, but what has the weather got to do with it? Why do individuals decide to alter their phenotypes instead of altering their habitat? Are there any costs and limits of plasticity? And what does it…

    Words: 999 - Pages: 4
  • The Importance Of Genetics

    The phenotype appears to be dependably to be a result of its genotypic and ecological impacts. Phenotypes may shift significantly notwithstanding when genotypes continue as before. For instance, when people of Asiatic extraction move to the United States, their kids (if raised in this nation) have a tendency to be bigger than the guardians and their grand­children even bigger. This implies an adjustment in phenotype however not really an adjustment in genotype. Better sustenance may build the…

    Words: 1118 - Pages: 5
  • Gregor Mendel Character Traits

    Originally it was believed that all traits are blended together. Due to the work of Gregor Mendel, though, it was shown that characteristics are a result of inherited factors, known as genes1. Genes are units of heredity on a chromosome that bring about our existence and create diversity. This diversity arises from the fact that there are different forms of genes known as alleles. All the alleles of an organism are referred to as that organism’s genotype and results in an organism’s phenotype,…

    Words: 1038 - Pages: 4
  • What Is The Effect Of Salt Concentration On Seed Germination

    Impact of Salt on Seed Germination Introduction Germination is a key event in a plant’s lifetime and controlled by two main factors which are water and salt stress (Yuan et al., 2016 and Vallejo et al., 2010). Salt stress affects plant growth and crop production by causing osmotic and ionic stress in plants. Alonso-Blanco et al in 2009 reported that less study was made on the traits in Arabidopsis thaliana despite the immense genetic variation present in the species and the importance of seed…

    Words: 1049 - Pages: 5
  • Natural Selection Experiment

    the adaptive phenotype. For natural selection to occur, there are three conditions that must be met. First and foremost, there must be variation in a population. If no variation occurs, then no individual will have a phenotype that is any more adaptive or maladaptive than another. Second, the variable trait must be heritable.…

    Words: 1458 - Pages: 6
  • Fruit Fly Experiment Essay

    The effect of being exposed to light effected the phenotype of the Drosophila melangaster. The phenotype frequencies changed for both the red eyed and white eyed fruit flies (Figure 1). In the populations that were in complete darkness, the white and red eyed phenotypic ratio stayed almost constant throughout the whole experiment for both male and female fruit flies, which was shown with a “V” formation (Figure 1). This trend did not continue, though when it came to the phenotypic ratio for…

    Words: 426 - Pages: 2
  • Quantitative Trait Analysis

    Drosophila flies have. Both of these types of traits fall under the quantitative traits category of quantitative genetics because they display a range of phenotypic variation that follow a normal distribution pattern. This means that the traits being analyzed do not fall under discrete phenotypes, but instead there is a wide variety of different offspring that can be present across…

    Words: 969 - Pages: 4
  • Natural Selection And Descent With Modification: Theories Of Evolution

    industrial and other human contamination from the early industrial revolution. In how location is a major factor to why the peppered moths had to change a phenotype to adapt to their changing environment (Richardson, Urban, Bolnick et al. 2014). As for the selection and gene flow of how the peppered moths were able to survive in a changing environment are examples of how natural selection had to occur for the peppered to undergo a genetic mutation (Saccheri, Rousset, Watts et al. 2008). As well,…

    Words: 1064 - Pages: 5
  • Darwin's Theory Of Natural Selection

    rediscovered and then combined with Darwin’s theory of natural selection into the Evolutionary Synthesis model. This theory refocuses natural selection from the individual to the gene, this replaced the model of the time; intelligent design, with one that predicted all phenotypes were caused by genes and that natural selection increased or decreased frequency depending on how genes alone affected fitness. This view was very restrictive as it only looked at one level for selection to act on, one…

    Words: 1106 - Pages: 5
  • Qualitative Traits In Eukaryotes

    A genotype is known as the complete genetic makeup of a given organism. Consequently, a genotype is the one responsible for the phenotype of an individual. In eukaryotes, a single genotype is capable of expressing more than one phenotype (observable characteristics). This possibility is because genes can go through lots of differentiation processes like mutation, changes in gene expression and frequency. So, mutations play a significant role in variation. For example, DNA can be affected by the…

    Words: 1353 - Pages: 5
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