Test your basic knowledge |

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. Identical alleles for a gene






2. 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.






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






4. 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.






5. 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.






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






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






8. Recognize and cut DNA at specific sequences usually palindromes






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






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






11. It is the time from when the Earth formed and simple life - forms evolved (and it is the longest era)






12. 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






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






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






15. 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.






16. The movement of individuals into an area






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






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






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






20. Movement of organisms ro of from a population






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






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






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






24. Dna moves during electrophoresis because of...






25. Heteros have a phenotype tintertmediate b/t phenotypes of the 2 homoz






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






27. Because of base pairing in DNA the amount of






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






29. Proteins are made of...






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






31. Selection against one end of a range of variation - resulting in a progressive change in allele frequency






32. Change to a chromosome in which part of the chromosome is repeated






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






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






35. Mating of 2 oism that differ in 2 characters






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






37. Hybrid is sterile so biologically unfit






38. Is active during transcription






39. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






40. 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






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






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






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






44. Term used to refer to an organism that has two different alleles for the same trait. e.g Tt is the heterozygous genotype for Tall.






45. Any agent that can cause a change in DNA






46. Which structure contains anticodons






47. Organ no longer serves a function






48. A codon is made of...






49. A model for the evolution of different froms over a long period of time but with only slight chchanges occring between successive generations






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