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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 gradual changes in gene frequencies in a population due to random events






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






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






4. Organ no longer serves a function






5. Similar embryological structures in different species - such as gill slits - may demonstrate that these species share a common ancestor.






6. The individuals choice of which mate they will choose. The choice is dependant on what traits the individual finds attractive. e.g some people will want their mates to be smart or pretty.






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






8. Any preserved remains of an organism from the past. Usually found in sedimentary rock.






9. Organ that serves no useful function in an organism






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






11. Is a trait that is more expressed than another trait. Is written in capital letters for Genotype. E.g Tall genotype is TT or Tt where T is the allele for tall trait and t is the trait for small. T will be expressed more.






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






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






14. Innate trait; shared ancestry






15. DNA is made of...






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






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






18. Chromosomes are collections of many






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






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






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






22. Type of rock made from small pieces of other rocks and organisms pressed together. Source of fossil preservation. Limited radioactive or absolute dating potential.






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






24. 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.






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






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






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






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






29. Transcrition occurs in the...






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






31. Recognize and cut DNA at specific sequences usually palindromes






32. 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.






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






34. How often a particular gene occurs in the population






35. Organism is preserved at very low temperatures. Preservation of both hard and soft parts can occur.






36. DNA that is coiled around proteins






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






38. All the factors in an organism's surroundings that can potentially affect it






39. Natural disaster eliminates most of the population - members left contribute the alleles for the new population.






40. Shows how the embryos of different groups resemble each other at particular stages. Similarities indicate groups may share a common ancestor






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






42. Dna moves during electrophoresis because of...






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






44. Selection for the ability to obtain a mate






45. 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






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






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






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






49. Another name for a gene






50. Trait where heterozygous is a blending of two alleles