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






2. During transcription an RNA molecule is formed






3. A pairing where the parent plants differ in only one character.






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






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






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






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






8. The environmental factors that favour certain phenotypes






9. The region of the chromosome that holds the two sister chromatids together during mitosis






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






11. Predicts the possible outcome of a genetic cross.






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






13. 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.






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






15. These prevent fertilization between species e.g. diff breeding season - mating behaviour






16. Because of base pairing in DNA the amount of






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






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






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






20. Translation occurs in the...






21. Trait evolves overtime; NO common ancestry






22. Two alternative forms of a gene e.g Tall vs Short






23. Innate trait; shared ancestry






24. A limb with five digits (fingers)






25. 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






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






27. Organ no longer serves a function






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






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






30. One of the identical rods of a chromosome.






31. The movement of genes between populations as a result of mating of migration






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






33. 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.






34. Term used to refer to an organism that has two identical alleles for a particular trait. e.g TT is the homozygous genotype for Tall.






35. 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.






36. Building block of a protein






37. Describes the isolation of a physical barrier e.g. body of water (ocean) or mountains






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






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






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






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






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






43. 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.






44. Visual expression of a trait






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






47. Used x ray cyrstallography to create an image of DNA






48. A genetic crosses that involve one trait. e.g TT plant crossed with tt plant has offspring who are heterozygous Tt.






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






50. Cross where you cross unknown genotype with a recessive