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CSET Genetics And Evolution

Subjects : cset, science, genetics
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Movement of organisms ro of from a population






2. Periods of little adaptive change






3. The offspring of a cross between two inbred lines within a single species. May also refer to the offspring of across between two species






4. Is the evolutionary process whereby a population becomes better suited to its habitat






5. All the factors in an organism's surroundings that can potentially affect it






6. Independent segregation of genes during the formation of gametes






7. Transcrition occurs in the...






8. DNA is made of...






9. Selection acting against the middle of a range of variation






10. Translation occurs in the...






11. Trait evolves overtime; NO common ancestry






12. A type of natural selection in which genetic diversity decreases as the population stabilises on a particular trait value






13. An equilibrium in the occurence of two or more different froms within the same population usually caused by different allele combiinations of a gene






14. A base found in DNA (but not in RNA). This base pairs with Adenine.






15. Building block of a nucleic acid (DNA and RNA)






16. When a few individuals become isolated from a larger population - this smaller group may establish a new population whose gene pool is different from their source population.






17. Mutation where an extra base is added






18. A change or error in the DNA sequence






19. What happens during the process of translation






20. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






21. A taxon originating from and including a single common ancestor






22. Trait where heterozygous is a blending of two alleles






23. Separates DNA by size






24. One of the types of fossils made from hardened tree resin. Preserves both hard and soft parts.






25. Chromosomes that determine the sex of an individual. These are X for female and Y for male. The female egg is an X while the male sperm can be X or Y






26. What is one benefit for having two strands of DNA?






27. Of a cell or organism having two sets of homologous chromosomes or twice the haploid number






28. process in which homologous chromosomes exchange portions of their chromatids during meiosis.






29. A genetic crosses that involve one trait. e.g TT plant crossed with tt plant has offspring who are heterozygous Tt.






30. The evolutionary process by which a species becomes better suited to its niche.






31. Type of sympatric speciation that occurs when a new species is formed because of a change in microhabitats






32. A type of protein molecule found in the chromosomes of eukaryotic cells but not prokaryotic cells






33. The comparison of the structures of different organisms






34. Layers of compressed sedimentary rock demonstrate the order or sequence at which events occurred. Cannot delineate the exact point of time - but is able to distinguish the order of events.






35. Change of an organism over time. This can be caused by changes in in habitat or need to adapt for survival.






36. A distinct population of a species that varies from other populations of the same species.






37. Term used to refer to an organism that has two different alleles for the same trait. e.g Tt is the heterozygous genotype for Tall.






38. Synonym for protein; chain of amino acids






39. Any agent that can cause a change in DNA






40. DNA that is coiled around proteins






41. Term used to refer to an organism that has two identical alleles for a particular trait. e.g TT is the homozygous genotype for Tall.






42. Gene

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43. A point of overlap of paired chromatids at which fusion and exchange of genetic material (crossing over) occurs during prophase I of meiosis.






44. Geologic period that followed the Precambrian;means 'ancient life' - early life (570-286 million years ago); single cell organisms - shells - mollusks - rise of first vertebrates - rise of land plants - amphibians - insects - seed plants - and trees






45. The independant evolution of similar traits - starting from a similar ancestral condition






46. Periods of rapid evolution punctuated by periods of little change






47. The condition in which there is no change in allele frequencies from generation to generation (i.e. no evolution)






48. Copying the code from DNA onto mRNA






49. Evolution of superficial phenotypic similarity of form as a result of similar selection pressures






50. A combining of genes or characters different from what they were in the parents