Allele frequency

determine what caused allele frequencies to change in D. melanogaster over the course of several generations. Was it a result of a biological factor such as genetic drift or natural selection or did the changes result because of chance? To answer this question we must compare the data to the null hypothesis. The null hypothesis was there is not a difference in the data that would be expected to happen by chance. Therefore, there are no forces causing changes in allele frequencies. For the small population

Earlobe Allele Frequency in General and Asian Populations Laura Kathryn Browne Georgia Perimeter College   Introduction: The purpose of this experiment is to observe the frequency of attached versus detached earlobes to better understand the presentation of traits in humans in general and in certain populations to determine if individuals of particular ethnicity are more likely to present with one phenotype of the other. It is understood that attached earlobes are the dominant phenotype and detached

Connolly Wendy Mosqueda-Lopez Christina Benson Nancy My Miyagi Paz Scenario #1 – Hardy-Weinberg Equilibrium: 1. What is the Hardy-Weinberg equilibrium used for? The Hardy-Weinberg equilibrium is used like a punnett square to see if genotype frequencies in a population remain constant from generation to generation. 2. What are the conditions that must be met in order to apply the Hardy-Weinberg equilibrium? The conditions that need to me for the Hardy Weinberg equilibrium to work are having a

portion of alleles that will be categorized by letters for example p has an allele of A1. Then there will be another portion that will be labeled as q which represents the A2 genotype. When these two genotypes mate and reproduce offspring have the potential to have one of the parents genotypes or essentially a combination of their parents genotypes which would look like A1A2. In the big picture the genotypes are recognized as the following A1 A1, A2 A2, or A1 A2. Even though these frequencies don’t change

To begin, each participant selected two alleles randomly out of 5 bins. The purpose of the alleles selected was to represent a set of maternal and fraternal alleles found in a black-footed ferret. The allelic frequencies were taken of the entire group. The groups total allele frequency was made to represent the wild population of black-footed ferrets. Each participant was then given a test tube containing a clear solution, which represented “ferret fluid”. Most of the test tubes contained HCl, while

the dominant allele overtakes the recessive allele. Ebony flies had to be homozygous recessive for the ebony allele. Our results were close to the expected in that we had more wildtype flies than ebony flies. The first offspring generation, observed in the third week followed this as 5 out of 20 total flies were ebony and the remaining 15 were wildtype in appearance. In the remaining generations, it looks as though the frequencies deviated from the expected Hardy-Weinberg frequencies, but still maintained

emigration is the transfer of alleles, which are responsible for genetic variations, from the gene pool of one population to another. Therefore, it may change allele frequencies or range due to the reproduction of the immigrated individuals. This study was performed to see how migration modifies the effects of frequent disasters on allele frequencies in moth populations. Migration would counteract the effects of natural disasters that increase genetic drift by introducing new alleles into the gene pool; this

variability (the existence of different alleles) and inheritance, but they eliminate natural selection ("SparkNotes: population genetics," 2014). The fact that no evolution occurs in a population meeting these conditions proves that evolution can only occur through natural selection ("SparkNotes: population genetics," 2014). The Hardy-Weinberg Law allows us to estimate the effect of selection pressures

unable to consider a single gene in a diploid organism let alone being able to determine its proportions. Luckily two very important individuals, Godfrey Hardy and Wilhem Weinberg, combined forces and derived a theorem to calculate equilibrium in allele frequencies. Today, this theorem is referred to as Hardy Weinberg Equilibrium. In one Cell Journal article, the importance of such a theorem is describe as, “Population-based genetic association studies have proven to be a powerful tool in identifying genes

hemoglobin which may result in death. Allele frequency changes over time depending on the pressures or circumstances facing a particular population. African populations are especially impacted by both malaria and sickle cell anemia. Depending on the impacted population, allele frequency often shifts and well suited organisms are likely to survive and allele frequencies can increase. When a population is effected by disease or other circumstances, allele frequency may decrease or change. HbA (normal