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






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






3. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






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






5. 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






6. The evolutionary process by which a species becomes better suited to its niche.






7. When F1 is fully fertile but F2 has low fertility (rice - cotton)






8. What does DNA stand for...






9. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






10. During transcription an RNA molecule is formed






11. Mating of 2 oism that differ in 2 characters






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






13. Transfer RNA; type of RNA that carries amino acids to the ribosome






14. Synonym for protein; chain of amino acids






15. A combining of genes or characters different from what they were in the parents






16. Selection for the ability to obtain a mate






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






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






19. Building block of a nucleic acid (DNA and RNA)






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






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






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






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






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






25. Pea plants






26. The study relating the evolution of new charateristics to changes in the genes controlling development






27. 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






28. 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.






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






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






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






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






33. The study of the structures of different organisms - looking at homologous parts






34. The evolutionary history/geneology of a group of organisms (a tree thingy)






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






36. Separates DNA by size






37. Organ no longer serves a function






38. Predicts the possible outcome of a genetic cross.






39. Chromosomes are collections of many






40. A population partially isolated from other populations of the same species






41. Which structure contains anticodons






42. The complete genetic material contained in an individual






43. DNA that is coiled around proteins






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






45. Gradual evolution within a lineage






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






47. Individual that is heterozygous for two traits; shows the phenotype governed by the dominant alleles but carries the recessive alleles






48. A change in the base sequence of a gene






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






50. Innate trait; shared ancestry