#Question id: 3425
#Unit 11. Evolution and Behavior
Many evolutionary forces are operating in population. In study, within population increase genetic variation due to -----A-----while decrease genetic variation due to ------B-----. Between populations increase genetic variation due to -----C-----while decrease genetic variation due to ------D-----.
#Question id: 3424
#Unit 11. Evolution and Behavior
Which of the following statement is correct?
A. Darwin, theory of natural selection based on better-adapted organisms would acquire more resources and leave more offspring.
B. When population sizes become too small, individuals accumulate deleterious (harmful) mutations, and survival of offspring is threatened
C. Inbreeding is more likely to take place in nature when population size becomes very small and the number of mates is limited.
D. Effective population size can be reduced by harem mating structures
E. The movement of a few individuals between populations can counteract the effects of genetic drift
#Question id: 3423
#Unit 11. Evolution and Behavior
Following statement regarding divergent evolution?
A- Spreading of same species to different and isolated environments which blocks the gene flow among the distinct populations
B. vertebrate limb of whale and elephant is one example of divergent evolution
C- Both orthologous genes and paralogous genes can be said to display divergent evolution
D- Sympatric speciation leads to divergence of one species in to two are more descendant species
Which of the following combination of above statement are correct?
#Question id: 3422
#Unit 11. Evolution and Behavior
Micro-evolution is the term used for changes in allele frequencies that occur over time.
A) It gives rise to changes in the gene pool, which results in few changes in the same species
B) It occur above species level
C) New addition, deletion in the genetic structure, resulting in the formation of new species
D) It changes occurs over short time scales
Which of the following combinations is correct?
#Question id: 3421
#Unit 11. Evolution and Behavior
Following figure show fitness variation the presence of natural selection and frequency of genotype before natural selection. What will be effect on the frequency of phenotype? (Y axis- Frequency of genotype, X axis – phenotype)
#Question id: 3420
#Unit 11. Evolution and Behavior
Following are key points about the effect of genetic drift:
A. Genetic drift is significant in small populations.
B. Genetic drift can cause allele frequencies to change in a pre-directed way.
C. Genetic drift can lead to a loss of genetic variation within populations.
D. Genetic drift can cause harmful alleles to become fixed.
Which one of the following combination of the above statements are true?