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






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






3. Hybrid is sterile so biologically unfit






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






5. 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.






6. A codon is made of...






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






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






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






10. Term used to refer to an organism that has two different alleles for the same trait. e.g Tt is the heterozygous genotype for Tall.






11. Mutation where an extra base is added






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






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






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






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






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






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






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






19. Chromosomes are collections of many






20. A fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found






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






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






23. Is the evolutionary process whereby a population becomes better suited to its habitat






24. The study relating the evolution of new charateristics to changes in the genes controlling development






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






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






27. Is a base found in DNA and RNA. Cytosine pairs with Guanine in DNA






28. Dna moves during electrophoresis because of...






29. T or F A cloned organism has the same proteins as another organism






30. Situation in which allele frequencies remain constant






31. It means chromosomes are paired. One of each chromosome in a pair originates from the father and one from the mother. They affect the same trait - but don't necessarily cause the same expression of the trait.






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






33. Separates DNA by size






34. Middle life (245-144 million years ago); rise of mammals and dinosaurs; the rise of birds; extinction of dinosaurs - rise of flowering plants






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






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






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






38. Mating of 2 oism that differ in 2 characters






39. Visual expression of a trait






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






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






42. Change in a DNA sequence that affects genetic information






43. 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.






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






45. Periods of rapid evolution punctuated by periods of little change






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






47. 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.






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






49. Synonym for protein; chain of amino acids






50. The movement of individuals into an area