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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. Selection for the ability to obtain a mate






2. Visual expression of a trait






3. Is a base found in DNA and RNA. In DNA its partner is Thymine. In RNA its partner is Uracil






4. A process where the organisms that have traits that aid in its survival (adaptive traits) will reproduce to pass that trait to futher generations thus increasing the frequency of that trait in the population. Vice versa traits that reduce the chance






5. The enzyme that binds to the promoter region of a gene during transcription is called...






6. A group of organisms of the same species occupying a given area.






7. Any agent that can cause a change in DNA






8. All the genes in a population. genes are added by reproduction and immigration and lost by death and emigration






9. The preserved remains or traces of an organism that lived in the past






10. Another term for pure breeding






11. Because of base pairing in DNA the amount of






12. A body cell






13. Movement of alleles into or out of a population due to the migration of individuals to or from the population






14. To create a recombinant DNA molecule - one would have to first cut two DNAs with creating before pasting them together






15. When competition causes two closely related species to become more different in regions where their ranges overlap






16. Inherited feature that tends to prevent species from interbreeding with other species






17. An organism that has characteristics resulting from chromosomal alteration. This is a result of crossing over of the chromosomes during Meiosis - mutations and random segregation.






18. The gradual changes in gene frequencies in a population due to random events






19. A fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found






20. The structure on a tRNA molecule that allows it interact with an mRNA molecule






21. A process that results in an allele having a different probability of remaining in the gene pool compared with that of another allele






22. Speciation which does not involve a period of geographical separation






23. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






24. Heteros have a phenotype tintertmediate b/t phenotypes of the 2 homoz






25. An episode of large - scale extinction affecting many different groups of organisms within a short period of time






26. Actual remains of an organism such as bones - teeth - shells - etc.






27. Structure present in an organism however does NOT have a known function. May link organisms with similar vestigial structures. Example: appendix - coccyx bone - whale leg bones.






28. Change to a chromosome in which a fragment of one chromosome attaches to a nonhomologous chromosome






29. The complete genetic material contained in an individual






30. Is found in DNA






31. A nucleotide of RNA is made of...






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






33. Innate trait; shared ancestry






34. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






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






36. Two alternative forms of a gene e.g Tall vs Short






37. Cell division that produces reproductive cells or gamates.This occurs in the gonads (testicle and ovaries in animals) Here the chromosome number is halved the original amount. (each new cell has a haploid number = n) All daughter cells are not geneti






38. Earth's history organized into four eras: Precambrian - Paleozoic - Mesozoic - and Cenozoic






39. How many codons are needed to specify three amino acids






40. Organisms with a similar underlying structure - but different function. Example: bird - bat and dolphin 'arm'. Shows a common ancestral link.






41. 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






42. The study of the past and present distribution of species.






43. The comparison of the structures of different organisms






44. Found only in that country






45. Pea plants






46. The sum total of an organism's requirements; its way of life






47. Trait where heterozygous is a blending of two alleles






48. Populations that can interbreed with neighboring populations but not with populations separated by larger geographical distances






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






50. The final product of transcription is...