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






2. Visual expression of a trait






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






4. Large - scale evolutionary changes that take place over long periods of time






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






6. A body cell






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






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






9. A copy of a gene is made during a process called this






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






11. Periods of little adaptive change






12. Mutation where an extra base is added






13. A change or error in the DNA sequence






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






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






16. Is found in DNA






17. Deoxyribonucleic acid carries the genetic code for the proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose) four bases Adenine - Thymine - Cytosine and Guanine. the sugar is bonded to a phosphate group. This forms a long






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






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






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






21. The comparison of the structures of different organisms






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






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






24. 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






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






26. Different alleles for a gene






27. Group of similar organisms that can breed and produce fertile offspring






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






29. The condition in which there is no change in allele frequencies from generation to generation (i.e. no evolution)






30. Three mRNA nucleotides that code for a specific amino acid






31. Form of reproductive isolation in which two populations reproduce at different times






32. DNA is made of...






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






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






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






36. Ribosomes are made of...






37. Copying the code from DNA onto mRNA






38. Change in a DNA sequence that affects genetic information






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






40. The offspring of a cross between two inbred lines within a single species. May also refer to the offspring of across between two species






41. Human - like species that existed millions of years ago as witnessed through fossil evidence.






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






43. Chromosomes are collections of many






44. Process by which a ribosome uses the code on mRNA to make proteins






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






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






47. A codon is made of...






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






49. A limb with five digits (fingers)






50. Hybrid is sterile so biologically unfit