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






2. The inherited characteristic often masked by the dominant characteristic and not seen in an organism. e.g. Tt plant will still be tall. Where T is the dominant trait for tall and t is the recessive trait for small.






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






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






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






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






7. Is found in DNA






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






9. Speciation which does not involve a period of geographical separation






10. Innate trait; shared ancestry






11. 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.






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






13. 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.






14. Chromosomes are collections of many






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






16. Speciation preceded by a period of geographical isolation






17. The movement of genes between populations as a result of mating of migration






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






19. Dna moves during electrophoresis because of...






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






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






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






23. Different alleles for a gene






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






25. Molecules that join together to form DNA and RNA. Monomers that make up a nucleic acid






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






27. Predicts the possible outcome of a genetic cross.






28. 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.






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






30. What does DNA stand for...






31. Gene

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32. Organ that serves no useful function in an organism






33. Separates DNA by size






34. Identical alleles for a gene






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






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






37. 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.






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






39. 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.






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






41. 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.






42. 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.






43. Recognize and cut DNA at specific sequences usually palindromes






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






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






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






47. Term used to refer to an organism that has two identical alleles for a particular trait. e.g TT is the homozygous genotype for Tall.






48. Ribosomes are made of...






49. Visual expression of a trait






50. Found only in that country