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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. Is any chromosome that is not a sex chromosome.






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






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






4. Organism is preserved at very low temperatures. Preservation of both hard and soft parts can occur.






5. Periods of little adaptive change






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






7. 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.






8. Determined the concept of complementary base pairing






9. 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.






10. Change in a DNA sequence that affects genetic information






11. Is active during transcription






12. Natural selection that causes the frequency of a particular allele to move in one direction






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






14. A trait that masks the expression of another trait






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






16. What does DNA stand for...






17. Proteins are made of...






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






19. Because of base pairing in DNA the amount of






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






21. Recognize and cut DNA at specific sequences usually palindromes






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






23. Ribosomes are made of...






24. A model for the evolution of different froms over a long period of time but with only slight chchanges occring between successive generations






25. An episode of large - scale extinction affecting many different groups of organisms within a short period of time






26. A codon is made of...






27. Separates DNA by size






28. Hybrid is sterile so biologically unfit






29. When competition causes two closely related species to become more different in regions where their ranges overlap






30. A DNA strand that has the bases CTAATGT forms a complete complementary double helix with






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






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






33. A process where the organisms that have traits that aid in its survival (adaptive traits) will reproduce to pass that trait to futher generations thus increasing the frequency of that trait in the population. Vice versa traits that reduce the chance






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






35. Building block of a protein






36. Method of replication that implies that each new strand of DNA is half original and half new






37. Chromosomes are collections of many






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






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






40. 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.






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






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






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






44. The molecules responsible for bringing amino acids to the ribosome during protein synthesis are






45. A copy of a gene is made during a process called this






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






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






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






49. When a few individuals become isolated from a larger population - this smaller group may establish a new population whose gene pool is different from their source population.






50. Gradual evolution within a lineage