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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 nucleotide of RNA is made of...






2. Separation of species or populations so that they cannot interbreed and produce fertile offspring






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






4. Gene

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5. What happens during the process of translation






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






7. Organ that serves no useful function in an organism






8. One of the identical rods of a chromosome.






9. 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.






10. Evolution of superficial phenotypic similarity of form as a result of similar selection pressures






11. The backbone of DNA consist of...






12. The comparison of the structures of different organisms






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






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






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






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






17. Individual that is heterozygous for two traits; shows the phenotype governed by the dominant alleles but carries the recessive alleles






18. When F1 is fully fertile but F2 has low fertility (rice - cotton)






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






20. 2 alleles for a character separate during the formation of gametes - so that each gamete only carriers one allele for each character

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






22. Genes contain instructions for assembling






23. A unique combination of traits that are passed down from one generation to another.






24. Used radioactive sulfur and radioactive phosphorus to determine that DNA is the genetic material - by demonstrating that it is DNA that is injected by bacteriophages into bacterial cells during infection






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






26. Building block of a protein






27. The capacity of an individual of certain genotype to reproduce. It is usually equal to the proportion of the individual's genes in all the genes of the next generation






28. Cross where you cross unknown genotype with a recessive






29. Predicts the possible outcome of a genetic cross.






30. Transcrition occurs in the...






31. Condition in which an organism has extra sets of chromosomes






32. Separates DNA by size






33. Is active during transcription






34. Ribosomes are made of...






35. 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.






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






37. A change in the base sequence of a gene






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






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






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






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






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






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






44. Different alleles for a gene






45. Mating of 2 oism that differ in 2 characters






46. Proteins are made of...






47. 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.






48. All the factors in an organism's surroundings that can potentially affect it






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






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