To determine: The town with the highest percentage of poison-resistant wild rats.
Introduction: Rodenticides are the pesticides that have a capability to kill the whole rodent species. Rodents have their own importance in the nature but sometimes require some control over their population, as they could transmit disease, destroy crops, and may cause ecological damage. Warfarin is a common anticoagulant that could be used as rodenticide to kill mice and rats.
After the discovery, warfarin has been widely used and later it resulted in the development of species of warfarin-resistant mice and rats. Another recently developed one is bromadiolone, which is called as the super-warfarin (second-generation warfarin) that has a greater ability to accumulate in the liver and kill the organism.
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Biology: The Unity and Diversity of Life (MindTap Course List)
- Minotaur is only found in the Labyrinth on the island of Crete. The area is famous for its annual spectacle of "Minotaur run," where herds of Minotaur rush out of the Labyrinth to reach their breeding grounds on the beautiful Aegean seashore. A group of Olympian scientists discovered that the horn size of the Minotaur is controlled by a single locus, with HH individuals having the longest, the Hh the medium, and hh the shortest horns. It is further found that the long-horned individuals tend to be tangled up along the way during the annual migration out of the Labyrinth, such that only 80% of the HH individuals can make it out of the Labyrinth alive. Once outside the Labyrinth, the short-horned individuals tend to be less successful at finding food, thus 60% would die from starvation before the beginning of the breeding season. Since the Hh individualsâ horn size are just right, so all of them survive the annual challenge. Initially, the annual migration of Minotaur started out with…arrow_forwardMinotaur is only found in the Labyrinth on the island of Crete. The area is famous for its annual spectacle of "Minotaur run," where herds of Minotaur rush out of the Labyrinth to reach their breeding grounds on the beautiful Aegean seashore. A group of Olympian scientists discovered that the horn size of the Minotaur is controlled by a single locus, with HH individuals having the longest, the Hh the medium, and hh the shortest horns. It is further found that the long-horned individuals tend to be tangled up along the way during the annual migration out of the Labyrinth, such that only 80% of the HH individuals can make it out of the Labyrinth alive. Once outside the Labyrinth, the short-horned individuals tend to be less successful at finding food, thus 60% would die from starvation before the beginning of the breeding season. Since the Hh individualsâ horn size are just right, so all of them survive the annual challenge. Initially, the annual migration of Minotaur started out with…arrow_forwardImagine that the volcano on Mt. St. Helens erupts again. All life is removed from the side of the mountain and has to recolonize. Your first task as a geneticist for United States Forest Service is to estimate the frequency of the red allele in the lupine plants that colonize the site. You know that the lupine seeds came from a nearby population where the frequency of the red allele has consistently been approximately 0.2 for many generations. However, in the first year (i.e. first generation, before any local reproduction) on Mt. St. Helens, the red allele of this newly colonized population has a frequency of 0.9. What is the most likely explanation for this difference in allele frequency from the nearby population?arrow_forward
- A total of 1000 members of a Central American population are typed for the ABO blood group. In the sample, 421 have blood type A, 168 have blood type B, 336 have blood type O, and 75 have blood type AB. Part A Use this information to determine the frequency of ABO blood group alleles in the sample. Recall that when considering genes with three alleles whose frequencies are represented by the variables p, q, and r, the sum of genotype frequencies resulting from trinomial expansion is: (p+q+r)² =p² + 2pq+q2+2pr+r²+2gr = 1arrow_forwardThe tiny frog Paedophryne amauensis was discovered by researchers purposefully searching for the source of an unusual sound, but sometimes similarity between two species can lead scientists to accidental discoveries. A previously unknown species of wild cat was inadvertently discovered by researchers who were sequencing the DNA of a house cat–sized South American wild cat called the tigrina. The DNA analysis revealed that many alleles found in the supposed tigrinas living in northeastern Brazil are not shared with other tigrinas. This finding suggested that the northeastern cats do not interbreed with other tigrinas and are therefore a different species. What prevents the two species from interbreeding?arrow_forwardResearchers divided 100 mice, with identical heredity composition that makes them susceptible to coronary artery disease, into two groups. Group A ate standard rodent chow and group B ate low-fat rodent chow for 120 days. what would you conclude if 45 out of 50 mice in group A show coronary artery disease and 45 out of 50 mice in group B show coronary artery disease?arrow_forward
- For a particular rodent, black fur is dominant over brown fur, and a long tail is dominant over a short tail. Give the possible genotypes and phenotypes of the possible offspring that could result from the breeding of a homozygous black fur and heterozygous tail rodent and a rodent of heterozygous for both traits.arrow_forwardIn the fish Species a, the expression of different combinations of four Hox genes results in structural differences in tissues and organs along the anterior-posterior axis. Figure 3 shows the expression pattern of four genes, i.e. Genes 1 – 4, and the tissue produced along the embryonic anterior - posterior plane of fish Species a wild type. The influence of Hox genes on the formation of specific types of tissue can be determined by introducing gain-of-function and loss-of-function mutations in specific Hox genes. Looking at Figure 3, predict what would happen to each one of the four types of tissues, if the expression of gene 3 was expanded anteriorly by a gain-of-function mutation so that the pattern of gene 3 expression would be the same as that of gene 2.arrow_forwardHalf of the worlds population eats rice at least twice a day. Much of this rice is grown in flooded conditions, and different strains of rice are tolerant (survive) or intolerant (die) under these conditions. Rice breeders used genetic crosses to test whether tolerance to flooding is a dominant trait. Researchers used three true-breeding flood-tolerant strains, FR143, BKNFR, and Kurk, and two true-breeding flood- intolerant strains, IR42 and NB, in the crosses. Results were obtained from three sets of crosses and are reported in the Table below: Results of cross of F1 to tolerant parent: F1 plants were crossed with the tolerant parent of the cross. Number of Plants Progeny Analyzed from Intolerant Tolerant Cross Alive Dead Total 1. F2 results of cross: IR42 FR13A 187 77 264 IR42 BKNFR 192 73 265 NB Kurk 142 52 195 2. Results of cross of F1 to intolerant parent: (F1 of IR42 FR13A) IR42 14 17 31 (F1 of IR42 BKNFR) IR42 15 10 25 (F1 of NB Kurk) NB 21 35 56 3. Results of cross of F1 to tolerant parent: (F1 of IR42 FR13A) FR13A 31 0 31 (F1 of IR42 BKNFR) BKNFR 28 0 28 (F1 of NB Kurk) Kurk 40 0 40 Do the data support the hypothesis that the tolerance trait is dominant? Justify your conclusion by explaining the results from each of the three sets of crosses in terms of genotypes and phenotypic ratios. Source: T. Setter et al. 1997. Physiology and genetics of submergence tolerance in rice. Annals of Botany 79:6777.arrow_forward
- In an assessment of learning in Drosophila, flies were trained to avoid certain olfactory cues. In one population, a mean of 8.5 trials was required. A subgroup of this parental population that was trained most quickly (mean = 6.0) was interbred, and their progeny were examined. These flies demonstrated a mean training value of 7.5. Calculate realized heritability for olfactory learning in Drosophila.arrow_forwardLion populations are found all over sub- Saharan africa. How do the sequences above reinforce or contradict the idea that populations of lions who are genetically similar live in the same geographic area?arrow_forwardGive only typing answer with explanation and conclusionarrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningHuman Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning