Which of the following is true about genetic drift? a) it only happens in small populations...
Which of the following is true about genetic drift?
| a) it only happens in small populations |
| b) it decreases the genetic variability among populations |
| c) it never results in allele fixation or loss |
| d) it can cause the prevalence of deleterious alleles to drift up and down |
Homework Answers
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Which of the following is true about genetic drift?
a) it only happens in small populations...
Select all of the statements about genetic drift that are true. It can cause alleles to...
Select all of the statements about genetic drift that are true. It can cause alleles to be lost in a population by chance. Genetic drift causes allele frequencies to change because only the strongest individuals in a population are reproducing Its strength is proportional to the size of a population -the larger the population, the greater the force Smaller populations experience greater changes in allele frequency due to genetic drift than large populations. It is a random process with respect...
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
Q3.3. Recall the prediction: Allele frequencies change by genetic drift equally quickly in large populations and...
Q3.3. Recall the prediction: Allele frequencies change by genetic drift equally quickly in large populations and in small populations. Is this correct? Why or why not? Yes. Genetic drift is sampling error, and sampling error is unpredictable, no matter the population size. Yes. Small populations experience more sampling error, but large populations have more reproduction overall, leading to similar rates of allele frequency change. O No. In the ferret experiments, allele frequencies changed more quickly in the small populations than...
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!
We expect natural selection and genetic drift to both result in the fixation of alleles, which...
We expect natural selection and genetic drift to both result in the fixation of alleles, which seems like it should reduce average heterozygocity in populations – there should be very little observed variation. However, we observe a tremendous amount of variation in populations. What can explain this observation?
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)...
Q 11. Which of the following statements is TRUE about Sickle cell anemia? (A) It is...
Q 11. Which of the following statements is TRUE about Sickle cell anemia? (A) It is caused by a genetic mutation in the beta-hemoglobin gene. (B) It confers heterozygote advantage against malaria (C) It results in abnormal, sickle-shaped erythrocytes. (D) All of the above. Q 12. Which of the following explains why a deleterious allele may persist in a population? (A) Random genetic drift (B) Balancing selection (C) Negative selection (D) Random genetic drift or balancing selection Q 13. Which...
Which of the following is NOT a likely consequence of genetic drift in a small population?...
Which of the following is NOT a likely consequence of genetic drift in a small population? i) increase in frequency of both homozygotes at a locus ii) decrease in heterozygosity of a population iii) inbreeding depression iv) fluctuation in allele frequencies
5. Which of the following statements is true about the theory of evolution? The focus of...
5. Which of the following statements is true about the theory of evolution? The focus of the theory of evolution is to explain the origins of life. According to the theory of evolution, life evolved entirely randomly. The focus of the theory of evolution is to explain how life diversified from the first living cells. According the theory of evolution, only the strongest and toughest can survive. 6. Which of the following best explains our current understanding of microevolution? Neither...
Two people who are “carriers” of (heterozygous) for Tay Sachs disease marry and plan a family....
Two people who are “carriers” of (heterozygous) for Tay Sachs disease marry and plan a family. What is the probability that a child from this union will suffer from Tay Sachs disease. (Recall that this is an autosomal recessive disorder, that is, homozygous recessives have the disease.) a. Zero b. 0.25 c. 0.5 d. 0.75 e. 1.0 6. At Hardy-Weinberg equilibrium, heterozygotes are the most common genotype in the population when- a. b. c. d . p> 0.67 q>0.67 and...
Select all of the statements about genetic drift that are true. It can cause alleles to be lost in a population by chance. Genetic drift causes allele frequencies to change because only the strongest individuals in a population are reproducing Its strength is proportional to the size of a population -the larger the population, the greater the force Smaller populations experience greater changes in allele frequency due to genetic drift than large populations. It is a random process with respect...
Q3.3. Recall the prediction: Allele frequencies change by genetic drift equally quickly in large populations and in small populations. Is this correct? Why or why not? Yes. Genetic drift is sampling error, and sampling error is unpredictable, no matter the population size. Yes. Small populations experience more sampling error, but large populations have more reproduction overall, leading to similar rates of allele frequency change. O No. In the ferret experiments, allele frequencies changed more quickly in the small populations than...
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)...
Q 11. Which of the following statements is TRUE about Sickle cell anemia? (A) It is caused by a genetic mutation in the beta-hemoglobin gene. (B) It confers heterozygote advantage against malaria (C) It results in abnormal, sickle-shaped erythrocytes. (D) All of the above. Q 12. Which of the following explains why a deleterious allele may persist in a population? (A) Random genetic drift (B) Balancing selection (C) Negative selection (D) Random genetic drift or balancing selection Q 13. Which...
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