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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. Evolutionary process in which a species or related species folllow different evolutionary paths to eventually become less related






2. Cross where you cross unknown genotype with a recessive






3. A geographic gradient in the extent to which a character is developed in a species






4. Selection against one end of a range of variation - resulting in a progressive change in allele frequency






5. Mutation where an extra base is added






6. Condition in which an organism has extra sets of chromosomes






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






8. Is a base found in DNA and RNA. This base pairs with Cytosine in DNA






9. You mate the unknown genotype with an organism showing the recessive trait. If any of the offspring show the recessive trait - the original unknown parent was heterozygous. If no recessive trats show up - the original parent was homozygous.






10. Form of reproductive isolation in which structural differences in the anatomy of reproductive organs prevent sperm transfer between individuals of different species






11. A change in the base sequence of DNA; the ultimate source of new alleles






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






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






14. The comparison of the structures of different organisms






15. The individuals choice of which mate they will choose. The choice is dependant on what traits the individual finds attractive. e.g some people will want their mates to be smart or pretty.






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






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






18. In the event of a sperm fertilizing an egg of another species - mechanisms that prevent result being fruitful






19. 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






20. 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.






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






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






23. Selection for the ability to obtain a mate






24. Transcrition occurs in the...






25. Innate trait; shared ancestry






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






27. Situation in which allele frequencies remain constant






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






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






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






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






32. 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.






33. Speciation preceded by a period of geographical isolation






34. Organism is preserved at very low temperatures. Preservation of both hard and soft parts can occur.






35. Natural selection that causes the frequency of a particular allele to move in one direction






36. A copy of a gene is made during a process called this






37. The region of the chromosome that holds the two sister chromatids together during mitosis






38. Embryos of similar organisms have very similar early development indicating similar DNA at work






39. What does DNA stand for...






40. Process by which an organism is slowly turned to stone as the body is replaced by minerals.






41. Science dealing with DNA and protein synthesis of living organisms. Manipulation of DNA.






42. During transcription an RNA molecule is formed






43. The final product of transcription is...






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






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






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






47. Evolution resulting from small specific genetic changes that can lead to a new subspecies






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






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






50. Structures in different but related species that are derived from the same ancestral structure but now serve different purposes.