Across
- 6. changes in population genetics in which extreme values for a trait are favored over intermediate values
- 8. First individual to experiment and understand how traits are passed down and inherited
- 9. is a type of natural selection in which genetic diversity decreases and stabilizes on a particular trait value
- 11. The outward expression of the gene for a trait
- 13. Having two identical alleles for a trait
- 14. In 1859 this man published 'The Origin of the Species by means of Natural Selection'
- 16. A system developed to name all species (2 part name)
- 20. The ancient prokaryotes found the be very different genetically but used to be lumped with true bacteria
- 21. Scientist who is credited with beginning to classify living things
- 23. an organism's ability to obtain or successfully copulate with a mate
- 25. The change in genetic composition of a population over successive generations
- 26. division of organisms that ranks above a kingdom in systems of classification
- 27. An allele that is expressed when present (blood type)
Down
- 1. The formation of new biological species, usually by the division of a single species into two or more genetically distinct ones
- 2. What farmers or breeders do when they are selecting for particular traits in plants and animals being raised
- 3. A version of a particular gene passed from a parent in sperm or egg cell
- 4. Offspring of two animals or plants of different breeds, varieties, species or genera
- 5. natural selection in which an extreme phenotype is favored over other phenotypes
- 7. Existence of shared ancestry between pair of structures, or genes, in different species
- 10. Familiar prokaryotic cells that inhabit almost every surface on our planet
- 12. The study of embryos and their development
- 15. Having two different alleles for a trait
- 17. Species that evolve and change due to events like natural disasters or weather
- 18. The domain comprised of organisms whose cells contain a true nucleus
- 19. An allele that is only expressed when homozygous
- 22. Both of the alleles an individual posses for a trait
- 24. The chance or disappearance of particular genes as individuals die or do not reproduce
- 28. A heritable feature passed from parent to off spring