What is Genetics Diversity? Genetic diversity in a population is the genetic variability in the genotype of species. It serves as a way for a population to adapt to an evolving environment because more variation allows species to survive in natural selection (“Introduction To Genetic Diversity,” n.d.). This can be assessed in various ways such as counting the allele frequency per loci, using chi-square to analyze “the differences among loci and breed,” testing for “Hardy-Weinberg Equilibrium” between gene and genotype frequencies and calculating the average heterozygosity (“Measuring Genetic Diversity,” 2011, p23-25). Also, measuring the nucleotide diversity in a population is not only another way of assessing genetic diversity but it allows researchers to determine the causative …show more content…
By comparing the single-nucleotide polymorphisms(SNPs) and examining the genetic sequence within a population, researchers can determine if the genetic diversity is caused by natural selection or mutation (Kawabe et al., 2014). As mentioned above, genetic diversity is caused by many factors such as mutations, natural selection, genetic drift and migration (PCG-Denver, 2006). Mutations change the nucleotides in DNA sequence through radiation, chemicals or error during DNA replication while natural selection allows organisms with the fitted allele to survive and spread (“What is Genetic Diversity?” n.d.). In addition, genetic drift changes the gene of a population over time which may lead to loss of beneficial genes and migration enhances gene flow as genes are transferred among populations (Star, B. & Spencer, H. G., 2013). Thus, genetic diversity may be detrimental or beneficial, but it is important for its occurrence because it helps regulate the lifespan of a population by providing gene resistance to diseases and environmental pressures (“What
A population’s genetic makeup can change through mutations, change in location, an increase in population, and an increase in mating between organisms. Breeding within species ensure the future offsprings of a particular species and creates a variations in alleles than before. The environment is related to the organism existence in a community an example is a white butterfly in a snowy region. Predictors are less likely to see the
Loss of genetic diversity in natural populations has often been attributed to a severe reduction in population size. Testing of nine loci in three heavily fished areas concluded that all loci that were strongly polymorphic in the 1982 study showed a reduction in heterozygosity with the exception of one
Natural sources of variation include: mutations, gene flow, and genetic shuffling. Mutations are random changes in DNA that result in beneficial, harmful, or no changes in an organism. Gene flow can also be referred to as migration. It is the exchange of genes of individuals from one population to another. Genetic shuffling occurs in meiosis when alleles switch to create new combinations of genes. The steps of natural selection are overproduction, variation, competition, and selection. Overproduction is important because it keeps the species from becoming extinct and allows for more variation in offspring. Variation is what can either help the organism have a higher chance of surviving or could lower the chance of surviving.
The general approach of this study will follow similar methodology to the approach used in Ward 2006. The Genetic diversity within the populations will be examined based on samples locus genotypes and the genome diversity can be examined for fits to Hardy-Weinberg expectations. The genetic differentiation between the samples will be quantified using the FST
Genetic diversity allows the population to adapt to changing environments and it contributes and adds to the gene pool.
Population bottlenecks occur when a population undergoes a large reduction in size as a result of environmental events or human activities. As a result, genetic variation may decrease as certain alleles may be over presented, under presented, or completely absent. Consequently, the genetic variation may continue to decline throughout subsequent generations as smaller populations, with less genetic diversity, sexually reproduce, passing on a limited amount of genes to future offspring. Furthermore, heterozygosity in these populations may decrease as a result of inbreeding. Inbreeding occurs when two closely related individuals reproduce; inbreeding may cause the accumulation of homozygous recessive genes and a decrease in genetic variation. Additionally, infrequently occurring alleles, rather than common alleles, may face a greater chance of being lost, which may further decrease the level of genetic diversity. As the population continues to decline, the genetic drift may be intensified as a result of increasing genetic limitations. Similarly, Rubin et al. (2001) compared smaller, isolated populations of Blanding’s turtles found in the Greater Chicago area to larger populations found in Michigan, Nova Scotia and Wisconsin, and determined, by using amplified polymorphic DNA, that the smaller populations had a loss of genetic variation in comparison to the
When investigating genetic diversity in populations using nuclear genetic markers, what are the two main genetic indices (parameters) that investigators typically use?
How do people behave? What makes us act the way we do? There are as many different answers as there are people. Each person is a unique makeup of individual characteristics which blend together to form the personality, the behavior of the person. We can identify certain broad characteristics of groups of people and apply them to individuals to get an idea of how they will behave in a given situation. This is called stereotyping and, when taken too far, will give a distorted picture of what to expect of a persons behavior. While you can never get a fully accurate picture of how someone will behave based on their demographics and characteristics, you can make certain general guesses that will point
Genetic diversity provides a species with its form and function. A species genotype refers to their genetic code; what their cells are going to be used for – hair cell, eye cell, muscle cell, etc. A species phonotype refers to the way in which that species gene will be expressed – blonde hair, blue eyes, large muscle tone; which significantly impacts the success of that individuals genes. Without genetic diversity among populations the gene pools would be very limited, which gives way to a rise in mutations and inevitably the end of a species. “Genes regulate body size, shape,
Behavior is best defined as the unique behaviors, emotions and thought processes of an individual including the way that he or she interacts with others. While much of behavior may be thought to be innate, there are also external factors that can impact an individual's behavior. These factors have diversity and demographic characteristics; four of these factors will be discussed in this paper and the impact each has on individuals will be shown. Religion, personality traits, age and gender are thought to have the greatest impacts and therefore providing the best opportunity for discussion.
An organizations success depends on it workforce. A talented and diverse workforce lends the most opportunities for success within the organization. A diverse workforce will also impact the organizations individual human behavior. Human behavior is the collection of activities by human beings and culture, emotions, ethnicity, gender, age, socioeconomic status, sexual orientation, religion, occupation, skills and abilities, personality traits, and values. This paper will discuss the impact that race and ethnicity, age, gender, and sexual orientation have on an individual's behavior.
There were several special populations that I found to be interesting. These populations include children with learning disabilities, overweight children, childhood diabetes, people with illnesses due to nervous system disorders, and abused women. After carefully looking at all these different topics I decided on people with illnesses due to nervous system disorders.
Here at XYZ Industries Inc. we believe in diversity and we want to celebrate the nature of our diversity. Because we are a company filled with great employees from different beliefs, race, color, and sexual orientation; starting this year the office will no longer host an annual Christmas Party. We will instead host a Winter Celebration. In an effort to be more accepting of individuals from all cultures and beliefs, we will no longer partake in activities affiliated solely with Christmas such as Secret Santa,
There is another side to the biodiversity of the evolutionary field, as the population weakens the species start the inbreeding of smaller populations, thus playing a role in the extinction of a species. Inbreeding is reproduction among members of a species that are genetically similar. The genetic inbreeding is designed to bolster populations of species whose numbers are in decline. However, when only a few species or varieties of a species are cultivated or survive, the genetic diversity of the organism declines, and population is more vulnerable to being wiped out by new diseases or climate changes because of the inbreeding (Alters, 2000).
Diversity is defined as “the condition of having or being composed of differencing elements” (Webster Dictionary). Through my clinical experiences I have seen a lot of diversity whether it be different ethnicity, the family culture/make-up or students living with disabilities in the classrooms. Specifically, in my urban clinicals I saw more ethnicity and culture diversity differences between student to student and student to teacher relationships. However, in my suburban school clinical experiences I also saw diversity, but in a different way. Here I saw much more diversity in family make-up.