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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. Even if the gametes of the two species meet - fertilization does not occur






2. Mating of 2 oism that differ in 2 characters






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






4. 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.






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






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






7. A fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found






8. A change or error in the DNA sequence






9. Era of recent life that began about 66 million years ago and continues today; includes the first appearance Hominids






10. Evolution resulting from small specific genetic changes that can lead to a new subspecies






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






12. 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.






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






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






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






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






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






18. Mutation where an extra base is added






19. Of a cell or organism having two sets of homologous chromosomes or twice the haploid number






20. When competition causes two closely related species to become more different in regions where their ranges overlap






21. Predicts the possible outcome of a genetic cross.






22. 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






23. The formation of new species as a result of evolution






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






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






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






27. An evolutionary 'branch' and its daughter 'twigs'






28. Populations that can interbreed with neighboring populations but not with populations separated by larger geographical distances






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






30. A body cell






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






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






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






34. Determined the complete double helical structure of DNA






35. 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






36. Is active during transcription






37. A small simple structure (as a fertilized egg) from which new tissue can develop into a complete organism. It is also a cell






38. 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.






39. A mutation in which one nucleotide is replaced by another nucleotide






40. What happens during the process of translation






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






42. Movement of organisms ro of from a population






43. Separates DNA by size






44. Dna moves during electrophoresis because of...






45. A codon is made of...






46. A trait that masks the expression of another trait






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






48. 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.






49. Uses metamorphic or igneous rock - calculates the age of an object by assessing the amount of radioactive element still present in the organism. Radioactive elements are slowly lost over time because of decay.






50. Process in which DNA is duplicated