Genetic drift

Name: Desire Salazar Date: 12/15/17 Period: Pre-AP Biology 5th Title: Population Genetics and Evolution Problem: How does the Hardy-Weinberg law provide evidence of evolution? Background Information: The lab will determine how the Hardy-Weinberg law provides evidence of evolution in a population. A population is “a group of organisms of one species that interbreed and live in the same place at the same time” (Biology Online). In each population, are three key elements: size, density, and…

Evolution is the change in heritable characteristics of biological populations over successive generations. It is the process that gives rise to variation in existing populations, drives speciation, and what leads to the extinction of new species. It is the natural change that occurs in response to environmental pressures resulting in phenotypical changes. Another way for phenotypical changes to occur in a species is by human intervention. Domestication is a form of human intervention. The…

species that stay in that environment and use it as their habitat adapt to the changes of the environment to survive the changes and their off springs are also able to survive. This happens because the species staying in that environment change their genetic make-up in order to accommodate themselves and these changes are passed on to the off springs and the off springs are immune to the changes. The species that are unable…

evolution one would first have to know and understand the four evolutionary processes. Evolutionists recognize mutation, natural selection, gene flow, and genetic drift as the latter stated. Mutation and natural selection are two of the processes that can alter the history of a species, but all four have a significant role in altering the genetic frequency. With mutation a change occurs within an organisms DNA sequence. With this change the in DNA it can either be…

Evolution refers to change that occurs in a population over time. These changes are produced at the genetic level as organisms’ genes mutate in different ways during reproduction. Evolution is a change in the gene pool of a population over time. Populations simply adapt to their surroundings. Lots of things change over time. People, animals, the changes of the leaves, the rivers having new species, the changes in the weather patterns. All through the Earth we all are changing. We are born and…

With natural selection its major driving mechanism, evolution is the change over time in the makeup of genetics of a population. Supported by evidence from many scientific methods, Charles Darwin, in On the Origin of Species, asserts that inheritable variations occur in individuals in a population. In the process known as natural selection, due to competition for limited resources, individuals with more favorable characteristics or phenotypes are more likely to survive and better reproduce,…

traits and genetic codes of biological populations over successive generations which can give rise to biological diversity. Generally, evolution also define as the process which modern organisms have descended from ancient ancestors and the process by which different kinds of living organism are believed to have developed from earlier forms during the history of the earth. The genetic differences that are heritable will passed on to their offspring or the next generations. The genetic…

that allowed bipedalism to become a reproductive advantage (Kottak, 2015). Gene flow is the exchange of genes between populations (Wilreker, 2016). Gene flow and interbreeding allowed the favorable trait of bipedalism to spread and multiply. Genetic drift is the change in gene frequencies as a consequence of random variation rather than natural selection (Wilreker, 2016). Individuals within the population without the favorable bipedalism trait would begin to die and not reproduce. As the…

of the sun. However, when environmental pressures change, the characteristics displayed within the population will begin, over generations, to change to. The four main forces that drive evolution are natural selection, mutation, gene flow and genetic drift. Natural selection is the process involving the organism adapting to environmental factors. This could be factors such as climate, availability of food sources and predation. Organisms that have physical characteristics that enable them to…

What is Tay-Sachs Disease Tay-Sachs disease is an autosomal recessive genetic disorder that was first witnessed by Waren Tay in 1881. The disease is named after Waren Tay and Bernard Sachs, both contributed to the discovery of the disease in the late 1800’s. Tay witnessed a “cherry-red” spot on the on the retina of the eye, which is a spot observed when the fovea’s center is surrounded by a white halo. Bernard Sachs witnessed that the disease was mostly prevalent in the Ashkenazi Jewish…