Across
- 3. heritable trait or behavior in an organism that aids in its survival and reproduction in its present environment
- 4. (also, Darwinian fitness) individual’s ability to survive and reproduce
- 8. flow of alleles in and out of a population due to the individual or gamete migration
- 9. physical structure present in an organism but that has no apparent function and appears to be from a functional structure in a distant ancestor
- 10. reproduction of individuals with favorable genetic traits that survive environmental change because of those traits, leading to evolutionary change
- 12. parallel structures in diverse organisms that have a common ancestor
- 16. all the alleles that the individuals in the population carry
- 18. process by which groups of organisms evolve in diverse directions from a common point
- 19. formation of a new species
- 20. magnification of genetic drift as a result of natural events or catastrophes
- 21. speciation that occurs in the same geographic space
Down
- 1. speciation when one species radiates to form several other species
- 2. event that initiates an allele frequency change in part of the population, which is not typical of the original population
- 5. group of populations that interbreed and produce fertile offspring
- 6. reproductive isolation mechanism that occurs after zygote formation
- 7. reproductive isolation mechanism that occurs before zygote formation
- 11. selection that favors characteristics at one end of the spectrum of existing variation
- 13. selection that favors two or more distinct characteristics
- 14. process by which groups of organisms independently evolve to similar forms
- 15. effect of chance on a population’s gene pool
- 17. selection that favors average characteristics