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A) Distinguish genetic drift from gene flow in terms of
how they each occur and their implications for future
B) Explain the importance of the bottle neck effect in
conservation biology of endangered species.
Step by step
Solved in 3 steps
- . Examining how populations lead to new lineages that arise based on alterations to allelic frequency and gametic exchange of new alleles is investigating ________________ a) macroevolution b) microevolution c) community ecology d) ecological species concept 2. Is this population evolving? 100 hawks, 2 alleles for eye color green to blue EyeG EyeG, EyeGEyeB, EyeB EyeB ; 20 EGEG, 70 EGEB , 10 EBEB A yes B no C not enough information to calculate thisExplain in 3 or 2 paragraphs -Genetic drift vs Gene flowbased on the image attached a) Explain how genetic drift caused egg hatching to decrease in the late 1980s and 1990. b) Why did hatching improve following translocations? c) What are the general effects of gene flow between populations
- 21) ALL BUT ONE of the statements below helps to describe gene flow. That is A) B) Without genetic variation, some of the basic mechanisms of evolutionary change cannot operate. There are three primary sources of genetic variation: 1. Mutations II. Gene flow III. Sexual reproduction D) It depends on a chance event that changes the gene pool. It can reduce the genetic differentiation between the two groups. It involves the movement of alleles from one population to another. It includes migration or the movement of individuals between populations. Some mutations always occur from generation to generation. But most mutations do not persist over time in the gene pool. Which mutation is MOST likely to become established and persist in a species?1.) Which statement below is not consistent with a population in Hardy-Weinberg equilibrium? A.) Genetic drift is occuring. B.) Random mating is occuring. C.) Population size is large. D.) Migration is not occuring. 2.) Sickel cell anemia is an autosomal recessive genetic disorder. Because individuals affected by sickle cell anemia have defective hemoglobin proteins, their blood cannot transport oxygen properly. There appears to be a relationship between the incidence of malaria and sickle cell anemia. Individuals with sickle cell anemia are carriers of the sickle cell allele have some resistance to malaria. Malaria is caused by the parasite Plasmodium and is transmitted between humans by mosquitoes.” If scientists are successful in significantly reducing or eliminating malaria, the best prediction for what will happen to the allele for sickel cell anemia in the population is that it will: A.)not be affected by the elimination by malaria. B.) increase as its selective advantage…a. Population - Parent Generation i) What is the blue phenotype frequency? ii) What is the Aa genotype frequency? iii) What is the A allele frequency? b. Population 2 - Offspring of parent generation above i) What is the blue phenotype frequency? ii) What is the Aa genotype frequency? iii) What is the A allele frequency? c. Is this population evolving? Please explain why or why not. AA AA Aa AA AA Aa Aa Aa Aa Aa Aa Aa aa aa aa aa Aa Aa
- Fixity of Species refers to… Group of answer choices A-the theory that species exist at a fixed location along a physiological continuum B-the fact that species are defined by fixed adaptations to their direct environment C-the theory presented by Thomas Malthus that population densities of any given species are most affected by mortality and fertility rates D-the pre-darwinian notion that species, once created, can never change E-the late 19th century concept that because mendelian traits are fixed they are evidence that variation within and between species are designed by God specifically for those species-) Which of the following is the most predictable outcome of increased gene flow between two pulations? Lower average fitness in both populations Higher average fitness in both populations Increased genetic difference between the two populations Decreased genetic difference between the two populations Increased genetic drift -) Mutation is the only evolutionary mechanism that is the ultimate source of variation in natural populations does little to change allele frequencies decreases fitness is more important in eukaryotes than in prokaryotes has no effect on genetic variation ) Three populations of crickets look very similar, but the males have courtship songs that sound ferent. What function would this difference in song likely serve if the populations came in contact? A temporal reproductive isolating mechanism A postzygotic isolating mechanism A behavioral reproductive isolating mechanism A gametic reproductive isolating mechanisma) Name and define the evolutionary processes that cause change in allele frequencies acrossgenerations. b) Describe how each process is expected to change allele frequencies across generations,including the following terms as appropriate:- genome-wide effects, loci-specific effects advantageous, deleterious, neutral- population size- speed of evolutionary change
- What is one important advantage of using environmental DNA (eDNA), instead of traditional field-based capture techniques, to study species distributions? For a given population density, eDNA has a higher probability of detecting a species if it is present. By looking at telomere length on the chromosomes found in an environmental DNA sample, researchers can gather information about the age distribution of organisms in a population. O By looking at epigenetic marks on an environmental DNA sample, researchers can gather information about the health of the organisms in a population. All of the aboveWhat is one important advantage of using environmental DNA (eDNA), instead of traditional field-based capture techniques, to study species distributions? 1.) For a given population density and sampling effort, eDNA has a higher probability of detecting a species if it is present. 2.) By looking at telomere length on the chromosomes found in an environmental DNA sample, researchers can gather information about the age distribution of organisms in a population. 3.) By looking at epigenetic marks on an environmental DNA sample, researchers can gather information about the health of the organisms in a population. 4.) All of the above1). Penguins in Stewart Island have a recessive mutation "twist-tail" that causes problems in the control of direction when swimming. In 2008 a survey of a large, freely interbreeding, population of 2,732 penguins revealed 316 with twist-tail phenotype. a) What percentage of the penguin population would you expect to be heterozygous at the twist-tail locus ? b) Where there is no mutation, migration or selection what percentage of the next generation would be homozygous dominants, heterozygotes and homozygous recessives?