iBISC403 Genetics and Evolutionary Biology Exam 2, March 22, 2012 Instructions: 1. Grid in your name on the answer sheet. 2. DO NOT grid in your student number, the course number or section. 3. Print your last name at the top of this cover page and short answer pages. 4. At the end of the exam, turn in your exam and your answer sheet together. All multiple choice questions are of equal value and together are worth 80% of the exam. The three short answer questions are each of indicated value and worth 20% of the exam.…
the very same albino is crossed with another black guinea pig, 7 black and 5 albinos are…
Lake Malawi’s cichlid male population of fish are tested on their ability to build bowers to attract the female population. Altering this extended phenotype, or ability to build bowers resulted in no change of mating, but males that built successful bowers showed to be less aggressive with other males in the population. This is important in maintaining polymorphic populations (Magalhaes, 2014). In my self-created scenario, the focus is on the small male population of cichlid fish. The male cichlid fish ability to build successful bowers is dominant while not building successful bowers is recessive within the population. After a recent hurricane wiped out the cichlid population food source, the male population has been tested on their ability to find other food for the female population. The ability includes better strength and speed. Female cichlid fish find this new ability to more attractive than building successful bowers because of this environmental change. The purpose of this study is to determine natural selection and to see if the male population of cichlid fish will be altered due to the changes in their environment.…
In George Mivart’s ‘Genesis of Species’, Mivart thoroughly reviews Darwin’s theory of natural selection. Mivart concludes that Darwin’s theory of natural selection is flawed because it cannot account for all of the mechanics of inheritance, specifically the initial developments of useful characteristics. He disputes that natural selection can account for the passing of negative or unnecessary traits, or for individualized traits occurring in only one species. He also asks how certain developments could occur without saltations, an idea absent in Darwin’s theories, but prominent in many of his contemporaries’. To illustrate these issues with natural selection, Mivart uses giraffes, insects that mimic other things in nature, fish, kangaroos, and whales as examples, which I will summarize below.…
Koalas have undergone an interesting history as they evolved from their nimiokoala greystanesi ancestors,and how much they’ve changed in time.Also how their environment may have changed as the years went by. To me koalas are interesting because they are known for hugging trees and they do this because trees are like their natural air conditioners. They are also herbivores and they are nocturnal so they eat mostly at night. They also…
While i get close to wrapping up this amazing story about plain zebras, let's give a few interesting facts. First interesting fact is that in order for zebras too fall asleep they will need to be next to their neighbors so they are warned if any predators come close so they can be warned. Another interesting fact would be that zebras can run up to 65 km/h which they use their amazing stamina and their zig zag to try to get away from pray.…
The color influences its overall fitness due to the fact that fur color plays a major role within the population and its overall ability to eventually reproduce and form a population. On light backgrounds, light colored pocket-mice have an advantage over dark colored pocket-mice. However, on the black rocks, dark mice possess an advantage over light mice, making the light colored mice attracted to predators. In both situations, the fur color of these two types of pocket mice helps to protect themselves against predators that look for the mice that does not match the substrate. Its color influence can increase or decrease its overall fitness in a particular environment. Depending on the color of the mice, it determines its chances of survival and to reproduce, passing their colored fur genes (favoured alleles) to their offspring and continue to form…
This hands-on laboratory exercise is a highly simplified model that attempts to simulate evolution by means of natural selection. Predators will act as agents of selection on their prey, a species whose members vary in color. We will assume that color is an inherited trait. Small squares of paper will represent the prey, which will be spread out of a piece of printed colored fabric that will serve as the habitat. The predators (you) will prey upon the population, with the surviving members reproducing and passing along the genes for color.…
The type of diseases that is associated with Tall Fescue and Zenith Zoysia is brown patch. The conditions that are favorable for brown patch are: several days of rain, heavy cloud cover and days temperatures above 80 degrees. When you use excessive nitrogen fertilization in the late spring and summer you are greatly increasing your chances for the disease to happen. The good news is that if you have dry weather, it will put a end to fungus activity and prevent the disease from…
The Leopard complex gene (LP) is an incompletely dominant trait that has been said to be in horses’ genes for 17,000 years. Researchers have found that there are many ways that the LP gene can affect a horse’s appearance. The Leopard complex is characterized by the absence of pigment (white spotting) in the coat. The most common characteristic can be seen along the hips, making the appearance of an Appaloosa horse. There are other appearances of the LP gene in horses as well, which consist of spotting around the eyes, noses, or legs, and striped hooves. Along with the appearance of the LP gene, researchers have also been studying the effects of containing the LP gene. Night blindness is one such example.…
Herbivores such as the Wildebeest and Zebra. He states that he knows that the lions will suffer but in the long run…
Since the natural resources are usually limited, the reproduction results to competition for survival by utilizing the scarcely available resources. Species of organisms that posses traits that give them advantage over the others, they usually survive and pass the traits to the next generation unless the others organisms lacking the traits which do not survive the competition. Thus the process of natural selection is determined by the organism’s evolutionary fitness which shows the ability of an organism to survive and reproduce and determines the amount of genetic traits to be passed to the next…
In the short story “Zebra” by Chaim Potok, it takes place by a school playground and a classroom. One of the main characters is a boy named Adam Zebrin, or Zebra which is his nickname. Another character is John Wilson, he at first a man digging through the trash but turn out to be an art teacher. The story is about a Zebra a boy who loves to run but faces a dilemma when something horrible occurs. Then a man comes along and he turns out to be a art teacher and he helps Zebra reach his goals.…
Before reading a book, the synopsis on the back of the book is what most readers take a look at first. However, the information provided in Zeitoun by Dave Eggers is very misleading. “The true story of one family, caught between America’s two biggest policy disaster: the war on terror and the response to Hurricane Katrina” is what the back of the book reads (Eggers). While the book does mention the struggle of living with racism against Muslims in America and the devastation of Hurricane Katrina, it is hardly about family. The main character of this novel is Abdulrahman Zeitoun, a Muslim man who resides in New Orleans. Though his work ethic is second-to-none, he is also stubborn and bullheaded which sometimes causes him to cloud his better judgment. When Hurricane Katrina was at its peak, a mandatory evacuation was issued, but Zeitoun decided to stay behind and care for the properties his company, Zeitoun Painting Contractors LLC, works on. His wife and children take the precautionary measures and evacuate. This causes a separation from them. Since Zeitoun does not demonstrate the true meaning of family and cares more for his self-interest, he cannot be portrayed as a hero.…
The short story “How the Leopard Got His Spots” by Rudyard Kipling starts out in a time when all animals in the High Veldt were very plain. The leopard was the most plain and blended in with the yellowish sand color of the desert the best. This enabled him to hide and kill the other animals like the zebra and giraffe with ease. There was also an Ethiopian man, who lived on the High Veldt with the Leopard; and the two would hunt together. Eventually the other animals realized they needed a change if they were going to survive, so they traveled to a new forest full of trees and leaves. Due to the shadows in the forest, the giraffe developed spots and the zebra developed stripes, which allowed them to blend in with their new environment. The leopard and the Ethiopian grew very hungry after all the animals leave so they decide to go in search of their missing breakfast. They encounter a baboon that tells them where to look and gives them the advice that they must “change as soon as they can”. Their journey ultimately that takes them to the jungle where they can smell the zebra and the giraffe, but they can’t see them. They catch the animals in the dark, but then the giraffe and the zebra trick the leopard and the Ethiopian out of eating them. Faced with a changing environment both leopard and human struggle to adapt and hunt successfully, however the Ethiopian is willing to take advice and changes his skin according to the baboon’s suggestion. He realizes that following the baboon’s advice is the best way to become a strong hunter again. The leopard is a little more stubborn, but the Ethiopian convinces him to change as well. The Ethiopian man uses the black left on his skin to makes the spots on the leopard.…