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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. In the event of a sperm fertilizing an egg of another species - mechanisms that prevent result being fruitful






2. 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.






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






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






5. A limb with five digits (fingers)






6. A body cell






7. What does DNA stand for...






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






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






10. Independent segregation of genes during the formation of gametes






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






12. Any indirect evidence of life preserved as an impression in rock; trails - footprints - tracks - burrows - and bite marks






13. The specific location of a gene on a chromosome






14. Hybrid is sterile so biologically unfit






15. Organ no longer serves a function






16. 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






17. Middle life (245-144 million years ago); rise of mammals and dinosaurs; the rise of birds; extinction of dinosaurs - rise of flowering plants






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






19. Relatively rapid proliferation from an ancestral type into new types which fill a diversity of ecological niches






20. Chromosomes are collections of many






21. A population partially isolated from other populations of the same species






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






23. Movement of organisms ro of from a population






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






25. 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.






26. Building block of a nucleic acid (DNA and RNA)






27. The backbone of DNA consist of...






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






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






30. The final product of transcription is...






31. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






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






33. DNA is made of...






34. 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.






35. Found only in that country






36. Determined the complete double helical structure of DNA






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






39. Features of different species tat are similar in function but not necessarily in structure and in which the similarity is not the result of common ancestry






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






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






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






43. Visual expression of a trait






44. Molecules that join together to form DNA and RNA. Monomers that make up a nucleic acid






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






46. Nucleotides that control which amino acids are added during protein synthesis






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






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






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






50. Evolution of superficial phenotypic similarity of form as a result of similar selection pressures