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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. A geographic gradient in the extent to which a character is developed in a species






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






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






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






5. Layers of compressed sedimentary rock demonstrate the order or sequence at which events occurred. Cannot delineate the exact point of time - but is able to distinguish the order of events.






6. The evolutionary process by which a species becomes better suited to its niche.






7. An ancestor that two or more descendants have in common






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






9. Trait where heterozygous is a blending of two alleles






10. Science dealing with DNA and protein synthesis of living organisms. Manipulation of DNA.






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






12. Is a base found in DNA and RNA. This base pairs with Cytosine in DNA






13. Identical alleles for a gene






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






15. Determined the concept of complementary base pairing






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






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






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






19. Is any chromosome that is not a sex chromosome.






20. Different alleles for a gene






21. During transcription an RNA molecule is formed






22. Another term for pure breeding






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






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






25. A type of protein molecule found in the chromosomes of eukaryotic cells but not prokaryotic cells






26. Building block of a protein






27. Physical characteristics of an organism based on its genotype. e.g. Plant that has a genotype of TT will have a phenotype of Tall.






28. The structure on a tRNA molecule that allows it interact with an mRNA molecule






29. Individual that is heterozygous for two traits; shows the phenotype governed by the dominant alleles but carries the recessive alleles






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






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






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






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






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






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






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






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






38. The comparison of the structures of different organisms






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






40. Another name for a gene






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






42. Found only in that country






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






44. A process that results in an allele having a different probability of remaining in the gene pool compared with that of another allele






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






46. Speciation preceded by a period of geographical isolation






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






48. 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






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






50. Independent segregation of genes during the formation of gametes