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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. Building block of a protein






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






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






4. 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.






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






6. Types of rocks formed after exposure to very high heat. Because of the high temperatures - fossils are not able to be recovered from these types of rocks. Absolute or radioactive dating is possible - however.






7. Describes a cell - nucleus - or organism that has only one set of unpaired chromosomes






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






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






10. The final product of transcription is...






11. Ribosomal RNA; type of RNA that makes up part of the ribosome






12. Gene

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






14. A DNA double helix is held together in the center by between nitrogenous bases






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






16. Gradual evolution within a lineage






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






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






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






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






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






22. Copying the code from DNA onto mRNA






23. 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.






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






25. Evolution resulting from small specific genetic changes that can lead to a new subspecies






26. The comparison of the structures of different organisms






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






28. Geologic period that followed the Precambrian;means 'ancient life' - early life (570-286 million years ago); single cell organisms - shells - mollusks - rise of first vertebrates - rise of land plants - amphibians - insects - seed plants - and trees






29. Features that are superficially similar but have different modes of development






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






31. A taxon originating from and including a single common ancestor






32. Organ that serves no useful function in an organism






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






34. Hybrid is sterile so biologically unfit






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






36. The environmental factors that favour certain phenotypes






37. Selection for the ability to obtain a mate






38. Cross where you cross unknown genotype with a recessive






39. Speciation preceded by a period of geographical isolation






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. Organisms with similar functions - but different underlying structure. Example: bird and insect wing. These structures do NOT show a common ancestral link.






42. Cell division that produces reproductive cells or gamates.This occurs in the gonads (testicle and ovaries in animals) Here the chromosome number is halved the original amount. (each new cell has a haploid number = n) All daughter cells are not geneti






43. Any agent that can cause a change in DNA






44. 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.






45. Mating of 2 oism that differ in 2 characters






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






47. An ancestor that two or more descendants have in common






48. Features of different species tat are similar in function but not necessarily in structure and in which the similarity is not the result of common ancestry






49. How often a particular gene occurs in the population






50. Transcrition occurs in the...