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






2. Types of rocks formed after exposure to very high heat. Because of the high temperatures - fossils are not able to be recovered from these types of rocks. Absolute or radioactive dating is possible - however.






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






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






5. 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






6. Closely related species occupying different habitats - niches preventing them from interbreeding






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






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






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






10. The environmental factors that favour certain phenotypes






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






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






13. Era of recent life that began about 66 million years ago and continues today; includes the first appearance Hominids






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






15. 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.






16. Building block of a protein






17. Speciation preceded by a period of geographical isolation






18. When zygote does not complete development or is physically weaker than normal






19. 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.






20. Even if the gametes of the two species meet - fertilization does not occur






21. A codon is made of...






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






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






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






25. Which type of Rna functions as a blue print of the genetic code






26. The comparison of the structures of different organisms






27. A limb with five digits (fingers)






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






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






30. Shows how the embryos of different groups resemble each other at particular stages. Similarities indicate groups may share a common ancestor






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






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






33. Evolution of living things - based on evidence from the past and present.






34. Molecules that join together to form DNA and RNA. Monomers that make up a nucleic acid






35. Synonym for protein; chain of amino acids






36. 2 alleles for a character separate during the formation of gametes - so that each gamete only carriers one allele for each character

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37. A change in the base sequence of a gene






38. Is found in DNA






39. Mating of an individual of unknown genotype but dominant phenotype w/ a homozygous recessive individual






40. Type of rock made from small pieces of other rocks and organisms pressed together. Source of fossil preservation. Limited radioactive or absolute dating potential.






41. 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.






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






43. A model for the evolution of different froms over a long period of time but with only slight chchanges occring between successive generations






44. A unique combination of traits that are passed down from one generation to another.






45. The backbone of DNA consist of...






46. Trait where heterozygous is a blending of two alleles






47. Separates DNA by size






48. DNA is made of...






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






50. Gradual evolution within a lineage