Across
- 4. Natural selection that favors individuals at both extremes of the phenotypic range, leading to the maintenance of genetic and phenotypic diversity within a population.
- 7. The theory that evolution occurs slowly and steadily, shaping the genetic and phenotypic characteristics of populations over long periods of time.
- 8. The physical separation of members of a population leading to reproductive isolation, often resulting in the divergence of gene pools and the formation of new species.
- 11. Reproductive isolation based on differences in behavior or mating rituals, leading to the formation of distinct species through the prevention of gene flow.
- 12. Natural selection that favors intermediate variants by acting against extreme phenotypes, maintaining the existing genetic and phenotypic diversity within a population.
- 16. The movement of individuals into a population, often introducing new genetic variation and influencing the genetic composition of the recipient population.
- 19. Natural selection that favors individuals at one extreme of the phenotypic range, leading to shifts in the average phenotype of a population over time.
- 20. The proportion of a particular allele among all allele copies in a population, influencing the genetic diversity and evolutionary potential of a population.
Down
- 1. The process by which organisms better adapted to their environment tend to survive and produce more offspring, leading to the propagation of advantageous traits within a population.
- 2. The condition where allele frequencies in a population remain constant over generations, providing a null model for understanding evolutionary processes in the absence of evolutionary forces.
- 3. A group of organisms of the same species occupying a particular space, interacting and interbreeding with one another.
- 5. A trait that helps an organism survive and reproduce in its environment, shaped by natural selection and genetic variation.
- 6. The differences in the genetic material within a population, providing the raw material for evolution and adaptation to changing environments.
- 9. A type of genetic drift that occurs after a small number of individuals colonize a new area, leading to a reduction in genetic diversity and the establishment of new allele frequencies.
- 10. The reduction in the genetic diversity of a population caused by a reduction in its size, often leading to decreased adaptive potential and increased susceptibility to environmental changes.
- 13. An adaptation that allows an organism to blend with its environment for protection from predators or prey.
- 14. The movement of individuals out of a population, often resulting in changes to the genetic composition of both the source and destination populations.
- 15. Structures in different species that are similar because of common ancestry, providing evidence for evolutionary relationships and shared evolutionary history.
- 17. The resemblance of one organism to another for protection or other advantages, often leading to coevolutionary dynamics between species.
- 18. The change in allele frequencies due to random sampling in small populations, often leading to the loss of genetic variation and the fixation of certain alleles.