An hypothesis for the extinction of the dinosaurs is that the earth had been hit by a gigantic meteor that caused the death of those big reptiles. In that case the entire genetic pool of those animals has been destroyed, invalidating the Hardy-Weinberg equilibrium. In Genetics what is this type of gene frequency change called?
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Q: Which of the following are NOT processes that can change allelic frequencies? Group of answer…
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A: Gene migration:- When migration of a section of population to another place and population occurs,…
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Q: Explain why evolutionary biologists monitor selectively neutral polymorphisms as molecular clocks
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A: Natural selection is the adaptation and alteration of populations of living organisms. Individuals…
Q: On average, genetic drift results in genetic diversity over time.
A: Genetic drift is the change in the frequency of an existing gene variant in a population due to…
Q: Which assumption of Hardy-Weinberg, when not met, effect the most evolutionary change? Why is it…
A: By reviewing the question, we need to answer tell Which assumption of Hardy-Weinberg, when not met,…
Q: Which of the following is NOT one of the four factors that contributes to evolution by producing and…
A: According to the Hardy Weinberg principle, the allele frequency and the genotypic frequency of…
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A: The study of genes, genetic variation, and heredity are studied under the defined branch of biology…
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A: Abstract Genome-wide association studies (GWAS) have evolved over the last ten years into a…
Q: Say something about HARDY-WEINBERG Principle pertaining to population genetics. If both allele and…
A: The Hardy-Weinberg principle states that a population's genotype, allele frequency, and absence of…
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A: Adaptation, natural selection, and associated evolution are factors that influence population growth…
Q: For neutral loci in non-coding regions of the genome, what two factors determine the level of…
A: Answer :- Option (B) is correct. - Mutation rate and heritability.
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Q: the meaning of fitness ?what two things do you suppose govern the rate of evolution by natural…
A: The term "evolution" describes the gradual, generational changes that take place in the inherited…
Q: Which of the following statements explains genetic variation? Genetic variation arises ____.…
A: Gene is the foremost or basic unit of hereditary.
Q: Using evidence from the text, how did natural selection determine the survival of medeival humans…
A: Evolution is an orderly change from one condition to another that are favourable for an individual…
Q: What is a Gene Pool? Explain?
A: The basic physical and functional unit of hereditary is referred to as gene, which is composed of…
Q: Which of the following assumptions is NOT part of Hardy-Weinberg principle? a. no geneflow b. no…
A: The Hardy-Weinberg principle states that the allele and the genotype frequency in the population…
Q: If heterozygosity is reduced, what happens to the potential for evolution?
A: Evolution is the alteration in the organisms of a population at the gene level that over time leads…
Q: One possible definition of evolution is that evolution can be seen as the change of allele…
A: Evolution is the modification in successive generations with time from preexisting species to the…
Q: How can we use the hardy Weinberg equation to identify cases where evolution is or is not occurring
A: Evolution is a steady phenomenon which bring about transformation in life from very simple ones…
Q: Natural selection means that the environment favors survival of some genotypes. From where does…
A: Natural selection can also give certain people a reproductive edge over others. Natural selection…
Q: What is the role of variation in evolution – if heterozygosity is reduced, what happens to the…
A: Evolution is the process of change in the characteristics of a population over time. The changes in…
Q: According to the theory of evolution, why have these changes occurred in horse populations over the…
A: The evolutionary lineage of the horse can be best understood with the paleontology. The history of…
Q: How does natural selection act on genetic variation? How can this lead to adaptations? How can a…
A: 1. Natural selection has the correlation where it acts directly on the phenotype and hence the…
Q: Deer mice are usually found in the woods and are dark brown in color. The deer mice that live in the…
A: Selection is the process by which various factors determine the reproductive fitness of a population…
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A: In the absence of additional evolutionary effects, the Hardy–Weinberg principle, often known as the…
Q: Describe three or more genetic mechanisms that may lead to the rapid evolution of a new species.…
A: Answer: Introduction: Evolution is the heritable changes occurs by one generation to other. There…
Q: Which of the following is the mutation rate? a. the likelihood that a new mutation will occur in a…
A: Mutation can be defined as the sudden and unpredictable changes that can occur in the nucleotide…
Q: Considering the principles of mutation , natural selection , and genetic drift do you expect…
A: Introduction: A change in allelic in a population that occurs by chance from generation to…
Q: Explain What is genetic drift? What is a founder? Are these important in large populations or in…
A: In population genetics, evolution is defined as a change in the frequency of alleles (gene variants)…
Q: Genetic variation is the product of completely random events, but acting upon this randomness is a…
A: The term "genetic variation" refers to the variation in the genetic composition of individuals…
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A: According to the Hardy-Weinberg equilibrium the allele and genotype frequencies of a population will…
Q: This type of experiment, where members of an outbred populations are introduced to an inbred…
A: The sustenance of a population depends on its reproductive success. Genetically favored reproduction…
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A: Fitness is the fundamental concept in evolutionary theory. This is defined as the ability of the…
Q: What evolutionary factors can cause allele frequencies to change and possibly lead to a genetic…
A: In science, polymorphism is the event of at least two plainly unique transforms or structures,…
Q: Why is mutation important to evolution if it is the microevolutionary force that generally has the…
A: Microevolution is the evolution that acts on a small population or in a single species and it is…
Q: Why is population level genetic variation important for evolution and what causes genetic variation…
A: Introduction Variation is defined as any difference between individual organisms, cells, or groups…
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Q: Can someone please explain the distinction of natural selection and evolution of populations?
A: Mutations are the random changes in the nucleotide sequences of the DNA. These mutations create…
Q: Dog breeders use selective breeding, also called artificial selection, to maintain a closed genetic…
A: Introduction Selective breeding includes meeting up parents with similar characteristics in order to…
Q: Recently, scientists have identified a mutation that is found at high frequency in Finnish…
A: The physical and functional unit of heredity is a gene. They transmit knowledge from one generation…
An hypothesis for the extinction of the dinosaurs is that the earth had been hit by a gigantic meteor that caused the death of those big reptiles. In that case the entire genetic pool of those animals has been destroyed, invalidating the Hardy-Weinberg equilibrium. In Genetics what is this type of gene frequency change called?
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- In the year 2374, humans finally developed the technology necessary for time travel. You are a scientist interested in the population genetics of extinct animals. Taking advantage of this technology advance, you decide to travel back 8 million years to conduct field work in Venezuela. You are studying a population of Phoberomys pattersoni, the world’s largest extinct rodent weighing approximately 700 kg (1500 lbs) and looking vaguely like a giant guinea pig. The coat color of this rodent varies between tan (dominant) and brown (recessive). Assume the population is in Hardy-Weinberg equilibrium. You observed 336 tan Phoberomys and 64 brown Phoberomys during your study. What is the frequency of the homozygous recessive genotype? ________________ What is the allelic frequency of the dominant (tan) allele in the population? ___________ Of the animals you observed, how many were heterozygous? _______________ As you observe the animals you count 200 brown and 450 tan. Conduct a…Scientists study the possible effects of human activity on the genetic variations within members of two populations of sparrows, A and B, that live within similar ecosystems. Population A lives in a recreational campsite while population B lives in a nature preserve. Both populations exhibit similar genetic variation between the parent population and second generation. However, a tornado touches down in the habitat of population A during the lifespan of the second generation. Which statement best describes the predicted difference between the third generation of the two populations? A - Population B underwent a speciation that will lead to an increase in the genetic variation of the third generation compared to population A due to natural selection. B - Population A underwent a speciation that will lead to an increase in the genetic variation of the third generation compared to population B due to natural selection. C - Population B underwent a bottleneck effect that will lead to a…In a population of yellow mushrooms, a mutation resulted in a new purple type of mushroom that herbivores avoided. Because herbivores avoided the purple mushrooms, they were able to spread more spores and increased to make up 1% of the population. In one year, however, flash flood killed all of the purple mushrooms in the population, leaving only a few yellow mushrooms alive. Identify which evolutionary mechanism was responsible for the fixation of the yellow mushroom genotype in this population. Select one: a. Mutation b. Genetic drift c. Non-random mating Ⓒd. Natural selection * Gene flow e.
- Imagine 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?What is the difference between a neutral and an adaptive evolutionary process? Describe two or more examples of each. At the molecular level, explain how mutations can be neutral or adaptive.Imagine a population of 80 horses in which all individuals are homozygous for an allele A1. But then a mutation introduces a new allele, A2, in one horse which is a heterozygote for this locus. Assuming the mutation is neutral, and no further mutation occurs, answer the following questions. Question 16 What is the probability that A2 will eventually become fixed? Question 17 What is the probability that A2 will go extinct?
- The dog breed West Highland Terrier is a product of artificial selection. Give a brief description of the breed and its desired traits. What wild ancestor did it come from? Was it produced with selective breeding or genetic engineering (i.e. genetically modified)? What are the benefits of artificial selection in this case? Are there potential negative consequences?Genetic variation is the product of completely random events, but acting upon this randomness is a very nonrandom process called natural selection. Explain or give an example.Natural selection predicts that two species that came from a common ancestor should have high degree of correlation in their genomes. what aspect (use) of correlation am I using when apply it for this purpose?
- "Ancestry tests" are sold by many companies. There are significant limitations to these tests. Why is this the case? High rates of gene flow between populations reduce the reliability with which any sequence can demonstrate membership in one particular population. Evaluating too few genetic loci, of which just a small number happen to be similar, can lead to the conclusion that individuals are much more genetically similar than they actually are. A DNA match between two individuals living today is not a match with an ancestor. Rather, it suggests that the two people may have inherited the DNA sequence from a common ancestor. all of these are limitations to "Ancestry tests" O High genetic variation among individuals within most populations makes it difficult to identify specific sequences that can reliably indicate membership in a population.The Out of Africa hypothesis (also called the African Replacement hypothesis) proposes that Homo sapiens arose in Africa and evolved there for several hundred thousand years. Then, some 85,000 years ago, a small band of Homo sapiens migrated out of Africa and populated the remainder of the world. Based on this hypothesis, what predictions would you make about worldwide human variation in mtDNA?You are studying two populations of pika. You find that the population inhabit in talus (broken rocks) are greyish. Another population live in coniferous forests have black fur. When individuals from each population are brought together in the lab, they produce offspring whose appearance is intermediate between the two parents. The offspring can breed and reproduce successfully with each other or pika of either parent population. You sequence three genes, Pigmentosa, Sparkly, and Zippy. For each of the three genes, the two populations differ from each other at a few nucleotides (<1%). Why is it hard to determine if these two pika populations belong to the same species or are two different species? In your answer/argument, refer to at least two pieces of evidence from the above scenario. Note, we are NOT asking you to determine if these are the same species or not.