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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. A process where the organisms that have traits that aid in its survival (adaptive traits) will reproduce to pass that trait to futher generations thus increasing the frequency of that trait in the population. Vice versa traits that reduce the chance






2. Used radioactive sulfur and radioactive phosphorus to determine that DNA is the genetic material - by demonstrating that it is DNA that is injected by bacteriophages into bacterial cells during infection






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






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






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






6. An organism that has characteristics resulting from chromosomal alteration. This is a result of crossing over of the chromosomes during Meiosis - mutations and random segregation.






7. You mate the unknown genotype with an organism showing the recessive trait. If any of the offspring show the recessive trait - the original unknown parent was heterozygous. If no recessive trats show up - the original parent was homozygous.






8. 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






9. Which structure contains anticodons






10. 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.






11. 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.






12. Is the evolutionary process whereby a population becomes better suited to its habitat






13. The adaptive increase in pigmentation as a result of human - induced pollutants






14. Embryos of similar organisms have very similar early development indicating similar DNA at work






15. The environmental factors that favour certain phenotypes






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






17. Inherited feature that tends to prevent species from interbreeding with other species






18. Translation occurs in the...






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






20. DNA that is coiled around proteins






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






22. Form of reproductive isolation in which tere are differences in species courtship behavior






23. T or F If a nucleic acid contain uracil it is DNA






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






25. Gene

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






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






28. Identical alleles for a gene






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






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






31. Found only in that country






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






34. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






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






36. Is a base found in DNA and RNA. Cytosine pairs with Guanine in DNA






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






38. Proteins are made of...






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






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






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






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






43. Selection acting against the middle of a range of variation






44. The movement of individuals into an area






45. The capacity of an individual of certain genotype to reproduce. It is usually equal to the proportion of the individual's genes in all the genes of the next generation






46. Form of reproductive isolation in which structural differences in the anatomy of reproductive organs prevent sperm transfer between individuals of different species






47. How often a particular gene occurs in the population






48. Cross where you cross unknown genotype with a recessive






49. Visual expression of a trait






50. Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest







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