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






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






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






4. Ribosomes are made of...






5. Actual remains of an organism such as bones - teeth - shells - etc.






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






7. A type of barrier between species; the species remain isolated because male and femal gametes of the different species cannot fuse - or they die before they unite.






8. The structure on a tRNA molecule that allows it interact with an mRNA molecule






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






10. Physical characteristics of an organism based on its genotype. e.g. Plant that has a genotype of TT will have a phenotype of Tall.






11. 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.






12. Evolution of the earth - which is hypothesized to have been formed over 4.6 billion years ago.






13. Gradual evolution within a lineage






14. An episode of large - scale extinction affecting many different groups of organisms within a short period of time






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






16. Innate trait; shared ancestry






17. 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.






18. A trait that masks the expression of another trait






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






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






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






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






23. Process in which DNA is duplicated






24. The complete genetic material contained in an individual






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






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






27. Proteins are made of...






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






29. Breeding organisms with specific traits in order to produce offspring with identical traits






30. Building block of a protein






31. T or F A cloned organism has the same proteins as another organism






32. Messenger RNA; type of RNA that carries instructions from DNA in the nucleus to the ribosome






33. Different alleles for a gene






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






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






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






37. Another name for a gene






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






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






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






41. Periods of little adaptive change






42. The specific location of a gene on a chromosome






43. 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.






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






45. Is a base found in DNA and RNA. In DNA its partner is Thymine. In RNA its partner is Uracil






46. A group of organisms of the same species occupying a given area.






47. Name for oism with one dominant and one recessive allele






48. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






49. Of a cell or organism having two sets of homologous chromosomes or twice the haploid number






50. The environmental factors that favour certain phenotypes