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






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






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






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






6. Change to a chromosome in which part of the chromosome is repeated






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






8. Trait evolves overtime; NO common ancestry






9. Describes the isolation of a physical barrier e.g. body of water (ocean) or mountains






10. It means chromosomes are paired. One of each chromosome in a pair originates from the father and one from the mother. They affect the same trait - but don't necessarily cause the same expression of the trait.






11. A change or error in the DNA sequence






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






13. Chromosomes are collections of many






14. Disappearance of a species from all parts of its geographical range






15. Describes the existence of a prezygotic reproductive barrier between two species as a result of them occupying or breeding in different habitats within the same general geographical area






16. Method of replication that implies that each new strand of DNA is half original and half new






17. Similar embryological structures in different species - such as gill slits - may demonstrate that these species share a common ancestor.






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






19. Process by which one species gives rise to two or more species






20. An evolutionary 'branch' and its daughter 'twigs'






21. The backbone of DNA consist of...






22. Any agent that can cause a change in DNA






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






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






25. Predicts the possible outcome of a genetic cross.






26. Threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next






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






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






29. Dna moves during electrophoresis because of...






30. Is any chromosome that is not a sex chromosome.






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






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






33. 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.






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






35. How often a particular gene occurs in the population






36. Identical alleles for a gene






37. Change in a DNA sequence that affects genetic information






38. 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.






39. Change in allele frequencies as a result of the migration of a small subgroup of a population






40. DNA is made of...






41. Organ that serves no useful function in an organism






42. The reduction of a population - typically by a natural disaster - such that the surviving population is no longer genetically representative of the original population.






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






44. Situation in which allele frequencies remain constant






45. Speciation preceded by a period of geographical isolation






46. Is the genetic makeup of an organism (TT or Tt) ; All the combinations of genes you have for a certain trait.






47. The final product of transcription is...






48. Innate trait; shared ancestry






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






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