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






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






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






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






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. Building block of a protein






7. 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






8. Building block of a nucleic acid (DNA and RNA)






9. Chromosomes are collections of many






10. Mutation where an extra base is added






11. What does DNA stand for...






12. Mating of 2 oism that differ in 2 characters






13. T or F a codon consist of three nucleotides






14. Gradual evolution within a lineage






15. Evolution of the earth - which is hypothesized to have been formed over 4.6 billion years ago.






16. During transcription an RNA molecule is formed






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






18. Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest






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






20. Separates DNA by size






21. Independent segregation of genes during the formation of gametes






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






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






24. A distinct population of a species that varies from other populations of the same species.






25. A copy of a gene is made during a process called this






26. Actual remains of an organism such as bones - teeth - shells - etc.






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






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






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






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






31. A change in the base sequence of DNA; the ultimate source of new alleles






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






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






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






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






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






37. The specific location of a gene on a chromosome






38. Is any chromosome that is not a sex chromosome.






39. Situation in which allele frequencies remain constant






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






41. A body cell






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






43. A base found in DNA (but not in RNA). This base pairs with Adenine.






44. DNA is made of...






45. Even if the gametes of the two species meet - fertilization does not occur






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






47. Similar embryological structures in different species - such as gill slits - may demonstrate that these species share a common ancestor.






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






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






50. 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