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Which is required for a population to evolve?
a. genetic diversity c. gene flow
b. selection pressure d. none of the above
Step by step
Solved in 2 steps
- Which of the forces is the ONLY way that new genetic diversity can be produced in a species? A. Mutation B. Gene Flow C. Natural Selection D. Genetic DriftWhat is the greatest source of genetic variation in plant and animal populations? a. Geographic variation b. Recessive masking in heterozygotes c. Selection d. Sexual reproductionAlleles that increase resistance to disease are expected to increase in frequency in the population as a result of? a. positive selection b. negative selection c. balancing selection d. artificial selection
- What is the term for organisms producing different phenotypes due to differences in the environment? a. Genetic variation b. Additive variation c. Phenotypic plasticity d. Reaction normWhich type of selection results in greater genetic variance in a population? a. stabilizing selection b. directional selection c. diversifying selection d. positive frequency-dependent selectionIs it better for an organism to maximize their direct fitness or their indirect fitness? a. Direct Fitness b. Indirect Fitness c. Trick question. Neither Direct or Indirect Fitness matter in evolution.
- What branch of biology deals with the genetic makeup of populations? A. cytology B. ecology C. Mendelian genetics D. population genetics E. population ecologyDarwin used the term "fitness" to refer to a. an individual's physical endurance b. an individual's ability to survive in the face of harsh conditions c. an individual's ability to reproduce d. an individual's physical strengthWhich statement least applies to the concept of fitness? A. Measures of fitness include mating sucess and fecundity. B. It is trait featured among organisms which survived a bottleneck event. C. Reproductive sucess of individuals can be enhanced by their social behaviors within a group. D. Fitness among individuals in a population can vary due to differential reproduction.
- Which of these is the least acceptable explanation for how an altruistic gene might spread in a population? a. Selection for a gene that benefits the individuals’ relatives b. Selection for helping individuals who might return the favor c. Selection for genes that benefit the species d. Selection for groups that are more cooperative than other groupsWhat is the main cause of genetic variation between identical twins? A. genetic drift B. the movement of alleles through sexual reproduction C. mutations generated in the previous generation D. geographic variation within a population E. environmental effectsWhat kind of trait is important to cladistics? a. shared derived traits b. shared ancestral traits c. analogous traits d. parsimonious traits