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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. Is found in DNA






2. Synonym for protein; chain of amino acids






3. 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.






4. Describes the existence of a prezygotic reproductive barrier between two species as a result of them occupying or breeding in different habitats within the same general geographical area






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






6. 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






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






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






9. A trait that masks the expression of another trait






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






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






12. Human - like species that existed millions of years ago as witnessed through fossil evidence.






13. A change or error in the DNA sequence






14. One of the identical rods of a chromosome.






15. Type of rock made from small pieces of other rocks and organisms pressed together. Source of fossil preservation. Limited radioactive or absolute dating potential.






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






17. A nucleotide of RNA is made of...






18. Layers of compressed sedimentary rock demonstrate the order or sequence at which events occurred. Cannot delineate the exact point of time - but is able to distinguish the order of events.






19. Transfer RNA; type of RNA that carries amino acids to the ribosome






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






21. 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






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






23. Is active during transcription






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






25. During transcription an RNA molecule is formed






26. Change in allele frequencies as a result of the migration of a small subgroup of a population






27. 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.






28. An evolutionary 'branch' and its daughter 'twigs'






29. Physical characteristics of an organism based on its genotype. e.g. Plant that has a genotype of TT will have a phenotype of Tall.






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






31. Organ that serves no useful function in an organism






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






33. To create a recombinant DNA molecule - one would have to first cut two DNAs with creating before pasting them together






34. A limb with five digits (fingers)






35. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






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






37. Transcrition occurs in the...






38. Shows how the embryos of different groups resemble each other at particular stages. Similarities indicate groups may share a common ancestor






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






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






41. How often a form of a gene appears in a gene pool






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






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






44. Inherited feature that tends to prevent species from interbreeding with other species






45. Because of base pairing in DNA the amount of






46. Organ no longer serves a function






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






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






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






50. Genes contain instructions for assembling