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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. How many codons are needed to specify three amino acids






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






3. Is found in DNA






4. The backbone of DNA consist of...






5. Cell division in which the nucleus divides into nuclei containing the same number of chromosomes. Mitosis involves growth and repair and occurs in the body cells.






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






7. The comparison of the structures of different organisms






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






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






10. Impression made from a organism in soft material such as sand or mud.






11. Mating of 2 oism that differ in 2 characters






12. Independent segregation of genes during the formation of gametes






13. Found only in that country






14. Movement of alleles into or out of a population due to the migration of individuals to or from the population






15. Organisms with a similar underlying structure - but different function. Example: bird - bat and dolphin 'arm'. Shows a common ancestral link.






16. A pairing where the parent plants differ in only one character.






17. Identical alleles for a gene






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






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






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






21. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






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






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






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






25. 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.






26. Chromosomes are collections of many






27. Earth's history organized into four eras: Precambrian - Paleozoic - Mesozoic - and Cenozoic






28. The signal on a mRNA molecule that designates the end of the coding sequence is called the...






29. A body cell






30. Another name for a gene






31. Organ that serves no useful function in an organism






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






33. 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.






34. Deoxyribonucleic acid carries the genetic code for the proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose) four bases Adenine - Thymine - Cytosine and Guanine. the sugar is bonded to a phosphate group. This forms a long






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






36. The complete genetic material contained in an individual






37. A point of overlap of paired chromatids at which fusion and exchange of genetic material (crossing over) occurs during prophase I of meiosis.






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






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






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






41. Innate trait; shared ancestry






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






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






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






45. Proteins are made of...






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






47. Threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next






48. Organ no longer serves a function






49. A limb with five digits (fingers)






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