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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. Periods of rapid evolution punctuated by periods of little change






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






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






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






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






6. Evolution of living things - based on evidence from the past and present.






7. What is one benefit for having two strands of DNA?






8. Is a base found in DNA and RNA. In DNA its partner is Thymine. In RNA its partner is Uracil






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






10. Predicts the possible outcome of a genetic cross.






11. Transcrition occurs in the...






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






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






14. During transcription an RNA molecule is formed






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






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






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






18. The final product of transcription is...






19. Two alternative forms of a gene e.g Tall vs Short






20. 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.






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






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






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






24. DNA that is coiled around proteins






25. Of a cell or organism having two sets of homologous chromosomes or twice the haploid number






26. Is the genetic makeup of an organism (TT or Tt) ; All the combinations of genes you have for a certain trait.






27. 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.






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






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






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






31. 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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32. Chromosomes that determine the sex of an individual. These are X for female and Y for male. The female egg is an X while the male sperm can be X or Y






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






34. Any agent that can cause a change in DNA






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






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






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






38. Change in a DNA sequence that affects genetic information






39. A combining of genes or characters different from what they were in the parents






40. Form of reproductive isolation in which structural differences in the anatomy of reproductive organs prevent sperm transfer between individuals of different species






41. Determined the complete double helical structure of DNA






42. 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.






43. An equilibrium in the occurence of two or more different froms within the same population usually caused by different allele combiinations of a gene






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






45. Dna moves during electrophoresis because of...






46. A group of organisms whose members are sufficiently alike to be able to reproduce and produce fertile offspring and who are unable to reproduce with other such groups






47. One of the identical rods of a chromosome.






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






49. Structure present in an organism however does NOT have a known function. May link organisms with similar vestigial structures. Example: appendix - coccyx bone - whale leg bones.






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