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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. 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.






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






3. Separation of species or populations so that they cannot interbreed and produce fertile offspring






4. The movement of individuals into an area






5. DNA that is coiled around proteins






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






7. Movement of organisms ro of from a population






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






9. Periods of rapid evolution punctuated by periods of little change






10. Innate trait; shared ancestry






11. 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.






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






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






14. To create a recombinant DNA molecule - one would have to first cut two DNAs with creating before pasting them together






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






16. Describes a cell - nucleus - or organism that has only one set of unpaired chromosomes






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






18. 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






19. The number of times an allele appears in a population






20. Large - scale evolutionary changes that take place over long periods of time






21. One of the identical rods of a chromosome.






22. Identical alleles for a gene






23. Selection acting against the middle of a range of variation






24. The sum total of an organism's requirements; its way of life






25. Another name for a gene






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






27. Periods of little adaptive change






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






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






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






31. Mutation where an extra base is added






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






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






34. T or F A cloned organism has the same proteins as another organism






35. Organ that serves no useful function in an organism






36. DNA is made of...






37. The offspring of a cross between two inbred lines within a single species. May also refer to the offspring of across between two species






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






39. Closely related species occupying different habitats - niches preventing them from interbreeding






40. T or F a codon consist of three nucleotides






41. What does DNA stand for...






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






43. Pea plants






44. Features that are superficially similar but have different modes of development






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






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






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






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






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






50. When zygote does not complete development or is physically weaker than normal







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