Which of these is not an underlying assumption of the neutral theory? A genetic drift is...
Which of these is not an underlying assumption of the neutral theory?
A genetic drift is the most important force at the DNA level
B most changes in DNA that become fixed have no effect on fitness
C purifying selection is rare
D positive selection is rare
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Which of these is not an underlying assumption of the neutral
theory?
A genetic drift is...
Genetic drift can be an important evolutionary process. This is due to the fact that (A...
Genetic drift can be an important evolutionary process. This is due to the fact that (A natural selection acting on the genetic variation of a large population B small isolated populations are unable to defend themselves from predators, therefore they loos genetic diversity. Natural selection, in this case, has less variation to work with. C when genetic drift is the only evolutionary process at work, one allele may be lost forever and the other may become fixed (100% frequency). D)...
Questino 7. How I genetic drift different from natural selection? A. Natural Selection occurs because some...
Questino 7. How I genetic drift different from natural selection? A. Natural Selection occurs because some alleles confer higher fitness, whereas genetic drift occurs because of sampling error. B. Natural selection has a stronger effect in large population, whereas genetic drift acts primarily in small populations. C. Natural selection is a mechanism of evoltion, whereas genetic drift is not a mechnaism but an outcome of evolution. D. Natrual selection tends to cause very rapid evolution whereas gentic drift tends to...
1. A newly-arisen neutral mutation will become fixed in a small population compared to a large...
1. A newly-arisen neutral mutation will become fixed in a small population compared to a large population. a) faster b) slower c) it can never become fixed 2. The reason the area of the genome immediately surrounding an advantageous allele is in linkage disequilibrium. a) selective sweep b) founder effect c) genetic drift d ) selection coefficient 3. Flies A1 & A2 are genetic clones and B1 & B2 are a different set of clones. You raise Ay and By...
1. Genetic drift is an important mechanism for maintaining genetic variation in populations. True False 2....
1. Genetic drift is an important mechanism for maintaining genetic variation in populations. True False 2. According to several studies (e.g., bacteriophage f1), most mutation are _______. A. lethal B. deleterious but not lethal C. approximately neutral D. beneficial 3. Most mutations occur in response to the adaptive needs of the organism. True False Can please answer all 3 questions ASAP. Thank you in advance!
While drift may, in fact, be important in all of the following forms of speciation, which...
While drift may, in fact, be important in all of the following forms of speciation, which form is it thought to be MOST important? Allopatric Sympatric Parapatric Peripatric Driftiatric Hybridization and gene flow occurs in a narrow zone of contact in which form of speciation? Allopatric Sympatric Parapatric Peripatric None of the above Which evolutionary force, acting alone, can cause a population to “ fall off” of an adaptive peak? Natural selection Random genetic drift Directed genetic drift Speciation Mutation
Which of the following statements about genetic drift as an evolutionary factor is true? a. It...
Which of the following statements about genetic drift as an evolutionary factor is true? a. It is more potent in a population with small numbers than in a population with large numbers. b. It is responsible for the selection of mutations. c. It is connected to the movements of alleles between populations of a single species. d. Its strength is proportional to the size of a population: the larger the population, the greater the force. e. Both a and b
Which of the following does not change allele frequencies in a population? A. genetic drift B....
Which of the following does not change allele frequencies in a population? A. genetic drift B. mutation C. migration D. nonrandom mating E. natural selection
Genetic drift is most likely to be an important evolutionary force in___________________. a. small microbial populations...
Genetic drift is most likely to be an important evolutionary force in___________________. a. small microbial populations b. microbial populationsthat are artificially established in the laboratory c. microbial populations that are infected with bacteriophages d. microbial populationsthat are isolated from the natural environment e. large microbial populations
Select the statements that accurately describe the effect of natural selection on genetic equilibrium: a. It...
Select the statements that accurately describe the effect of natural selection on genetic equilibrium: a. It can cause allele frequencies in a population to be in genetic equilibrium. b. It can cause a dominant allele for a gene to become more abundant in a population. c. It can cause an allele to become more abundant in a population if it provides a fitness advantage over other alleles for that trait. d. It is an evolutionary force that prevents natural populations...
Question 6 1 pts You compare the genomes of two related species. You find that genes...
Question 6 1 pts You compare the genomes of two related species. You find that genes that regulate developmental processes (the ones that shape how the body forms) exhibit a lot of non-synonymous substitutions, while genes involved in basic cell function exhibit more synonymous substitutions. What does this indicate? The developmental regulation genes have undergone positive selection for changes in function, while the basic cell function genes have undergone purifying selection The developmental regulation genes have undergone purifying selection, while...
Genetic drift can be an important evolutionary process. This is due to the fact that (A natural selection acting on the genetic variation of a large population B small isolated populations are unable to defend themselves from predators, therefore they loos genetic diversity. Natural selection, in this case, has less variation to work with. C when genetic drift is the only evolutionary process at work, one allele may be lost forever and the other may become fixed (100% frequency). D)...
1. A newly-arisen neutral mutation will become fixed in a small population compared to a large population. a) faster b) slower c) it can never become fixed 2. The reason the area of the genome immediately surrounding an advantageous allele is in linkage disequilibrium. a) selective sweep b) founder effect c) genetic drift d ) selection coefficient 3. Flies A1 & A2 are genetic clones and B1 & B2 are a different set of clones. You raise Ay and By...
Question 6 1 pts You compare the genomes of two related species. You find that genes that regulate developmental processes (the ones that shape how the body forms) exhibit a lot of non-synonymous substitutions, while genes involved in basic cell function exhibit more synonymous substitutions. What does this indicate? The developmental regulation genes have undergone positive selection for changes in function, while the basic cell function genes have undergone purifying selection The developmental regulation genes have undergone purifying selection, while...
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