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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. Cell division in which the nucleus divides into nuclei containing the same number of chromosomes. Mitosis involves growth and repair and occurs in the body cells.






2. T or F a codon consist of three nucleotides






3. 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.






4. 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.






5. The formation of new species as a result of evolution






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






7. Is found in DNA






8. Trait evolves overtime; NO common ancestry






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






10. The movement of genes between populations as a result of mating of migration






11. Is a base found in DNA and RNA. Cytosine pairs with Guanine in DNA






12. A trait that masks the expression of another trait






13. Impression made from a organism in soft material such as sand or mud.






14. Used x ray cyrstallography to create an image of DNA






15. Middle life (245-144 million years ago); rise of mammals and dinosaurs; the rise of birds; extinction of dinosaurs - rise of flowering plants






16. Which structure contains anticodons






17. A DNA double helix is held together in the center by between nitrogenous bases






18. DNA that is coiled around proteins






19. The signal on a mRNA molecule that designates the end of the coding sequence is called the...






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






21. Selection acting against the extremes of a range of variation - resulting in resistance to change in allele frequencies






22. Three mRNA nucleotides that code for a specific amino acid






23. Identical alleles for a gene






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






25. How often a form of a gene appears in a gene pool






26. The type of environment in which an organism or group normally lives or occurs






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






28. Nucleotides that control which amino acids are added during protein synthesis






29. Features that are superficially similar but have different modes of development






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






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






32. Different alleles for a gene






33. The inherited characteristic often masked by the dominant characteristic and not seen in an organism. e.g. Tt plant will still be tall. Where T is the dominant trait for tall and t is the recessive trait for small.






34. 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






35. An ancestor that two or more descendants have in common






36. Features of different species tat are similar in function but not necessarily in structure and in which the similarity is not the result of common ancestry






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






38. The banding pattern of a persons DNA after being cut and run on gel is called






39. Name for oism with one dominant and one recessive allele






40. What happens during the process of translation






41. Speciation preceded by a period of geographical isolation






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






43. Transcrition occurs in the...






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






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






46. Another term for pure breeding






47. Messenger RNA; type of RNA that carries instructions from DNA in the nucleus to the ribosome






48. Is active during transcription






49. Form of reproductive isolation in which tere are differences in species courtship behavior






50. 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.