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






2. A combining of genes or characters different from what they were in the parents






3. The gradual changes in gene frequencies in a population due to random events






4. Hybrid is sterile so biologically unfit






5. 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.






6. Is a trait that is more expressed than another trait. Is written in capital letters for Genotype. E.g Tall genotype is TT or Tt where T is the allele for tall trait and t is the trait for small. T will be expressed more.






7. One of the identical rods of a chromosome.






8. Evolution of living things - based on evidence from the past and present.






9. Evolutionary process in which a species or related species folllow different evolutionary paths to eventually become less related






10. Dna moves during electrophoresis because of...






11. The banding pattern of a persons DNA after being cut and run on gel is called






12. It is the time from when the Earth formed and simple life - forms evolved (and it is the longest era)






13. A codon is made of...






14. The complete genetic material contained in an individual






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






16. Inherited feature that tends to prevent species from interbreeding with other species






17. process in which homologous chromosomes exchange portions of their chromatids during meiosis.






18. During transcription an RNA molecule is formed






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






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






21. How often a particular gene occurs in the population






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






23. Movement of organisms ro of from a population






24. Are noncoding sequences in the gene that are removed from RNA after transcription






25. Different alleles for a gene






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






27. Mating of an individual of unknown genotype but dominant phenotype w/ a homozygous recessive individual






28. Structures in different but related species that are derived from the same ancestral structure but now serve different purposes.






29. Process by which one species gives rise to two or more species






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






31. Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest






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






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






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






35. 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.






36. Building block of a protein






37. Form of reproductive isolation in which tere are differences in species courtship behavior






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






39. DNA is made of...






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






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






42. A type of barrier between species; the species remain isolated because male and femal gametes of the different species cannot fuse - or they die before they unite.






43. The gradual changes in gene frequencies in a population due to random events






44. 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.






45. Structure present in an organism however does NOT have a known function. May link organisms with similar vestigial structures. Example: appendix - coccyx bone - whale leg bones.






46. Which structure contains anticodons






47. Change of an organism over time. This can be caused by changes in in habitat or need to adapt for survival.






48. The comparison of the structures of different organisms






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






50. Determined the complete double helical structure of DNA