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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. Genes contain instructions for assembling






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






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






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






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






6. 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.






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






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






9. Three dimensional shape of organism made from a mold. May be created with plaster or over time with minerals.






10. Transcrition occurs in the...






11. Change to a chromosome in which a fragment of the chromosome is removed






12. Proteins are made of...






13. The movement of individuals into an area






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






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






16. Uses metamorphic or igneous rock - calculates the age of an object by assessing the amount of radioactive element still present in the organism. Radioactive elements are slowly lost over time because of decay.






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






18. 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






19. A change in the base sequence of a gene






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






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






22. Any agent that can cause a change in DNA






23. Geologic period that followed the Precambrian;means 'ancient life' - early life (570-286 million years ago); single cell organisms - shells - mollusks - rise of first vertebrates - rise of land plants - amphibians - insects - seed plants - and trees






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






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






26. Separates DNA by size






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






28. These prevent fertilization between species e.g. diff breeding season - mating behaviour






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






30. The environmental factors that favour certain phenotypes






31. Consists of all genes - including all the different alleles - that are present in a population






32. T or F a codon consist of three nucleotides






33. A base found in DNA (but not in RNA). This base pairs with Adenine.






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






35. The molecules responsible for bringing amino acids to the ribosome during protein synthesis are






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






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






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






39. Because of base pairing in DNA the amount of






40. Different alleles for a gene






41. Synonym for protein; chain of amino acids






42. Trait evolves overtime; NO common ancestry






43. Another name for a gene






44. Is a sequence of DNA that codes for a protein and thus determines a trait. This is because the sequence of bases code for certain proteins.






45. Visual expression of a trait






46. 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






47. Organ no longer serves a function






48. Pea plants






49. A small simple structure (as a fertilized egg) from which new tissue can develop into a complete organism. It is also a cell






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