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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. Periods of rapid evolution punctuated by periods of little change






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






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






4. Chromosomes that determine the sex of an individual. These are X for female and Y for male. The female egg is an X while the male sperm can be X or Y






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






6. Any agent that can cause a change in DNA






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






8. Cross where you cross unknown genotype with a recessive






9. Which structure contains anticodons






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






11. Copying the code from DNA onto mRNA






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






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






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






15. The backbone of DNA consist of...






16. Organ that serves no useful function in an organism






17. The final product of transcription is...






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






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






20. A base found in DNA (but not in RNA). This base pairs with Adenine.






21. Innate trait; shared ancestry






22. Natural disaster eliminates most of the population - members left contribute the alleles for the new population.






23. Change to a chromosome in which a fragment of one chromosome attaches to a nonhomologous chromosome






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






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






26. How many codons are needed to specify three amino acids






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






28. A codon is made of...






29. The complete genetic material contained in an individual






30. Uses metamorphic or igneous rock - calculates the age of an object by assessing the amount of radioactive element still present in the organism. Radioactive elements are slowly lost over time because of decay.






31. Because of base pairing in DNA the amount of






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






33. The comparison of the structures of different organisms






34. Organ no longer serves a function






35. Trait where heterozygous is a blending of two alleles






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






37. A change in the base sequence of a gene






38. How often a particular gene occurs in the population






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






40. Hybrid is sterile so biologically unfit






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






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






43. 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.






44. Selection for the ability to obtain a mate






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






46. What happens during the process of translation






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






48. Ribosomes are made of...






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






50. Three dimensional shape of organism made from a mold. May be created with plaster or over time with minerals.