Test your basic knowledge |

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. Relatively rapid proliferation from an ancestral type into new types which fill a diversity of ecological niches






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






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






4. Innate trait; shared ancestry






5. Visual expression of a trait






6. Pea plants






7. 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.






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






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






10. Used x ray cyrstallography to create an image of DNA






11. The study of the past and present distribution of species.






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






13. Name for oism with one dominant and one recessive allele






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






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






16. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






17. T or F a codon consist of three nucleotides






18. Is active during transcription






19. 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.






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






21. A process that results in an allele having a different probability of remaining in the gene pool compared with that of another allele






22. 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






23. Disappearance of a species from all parts of its geographical range






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






25. Which type of Rna functions as a blue print of the genetic code






26. Process by which a ribosome uses the code on mRNA to make proteins






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






28. 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






29. Situation in which allele frequencies remain constant






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






31. 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.






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






33. 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.






34. A nucleotide of RNA is made of...






35. 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






36. Closely related species occupying different habitats - niches preventing them from interbreeding






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






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






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






40. In the event of a sperm fertilizing an egg of another species - mechanisms that prevent result being fruitful






41. Is a base found in DNA and RNA. This base pairs with Cytosine in DNA






42. A change in the base sequence of a gene






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






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






45. Proteins are made of...






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






47. A codon is made of...






48. 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.






49. Periods of little adaptive change






50. Copying the code from DNA onto mRNA