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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 point of overlap of paired chromatids at which fusion and exchange of genetic material (crossing over) occurs during prophase I of meiosis.






2. Synonym for protein; chain of amino acids






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






4. Is the evolutionary process whereby a population becomes better suited to its habitat






5. Cross where you cross unknown genotype with a recessive






6. Change to a chromosome in which a fragment of one chromosome attaches to a nonhomologous chromosome






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






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






9. A change or error in the DNA sequence






10. Organism is preserved at very low temperatures. Preservation of both hard and soft parts can occur.






11. Is found in DNA






12. A codon is made of...






13. Selection for the ability to obtain a mate






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






15. 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.






16. Speciation preceded by a period of geographical isolation






17. process in which homologous chromosomes exchange portions of their chromatids during meiosis.






18. 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.






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






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






21. Process in which DNA is duplicated






22. Movement of organisms ro of from a population






23. Evolution resulting from small specific genetic changes that can lead to a new subspecies






24. Group of similar organisms that can breed and produce fertile offspring






25. Dna moves during electrophoresis because of...






26. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






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






28. 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






29. A pairing where the parent plants differ in only one character.






30. Another name for a gene






31. The region of the chromosome that holds the two sister chromatids together during mitosis






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






33. 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.






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






35. The type of environment in which an organism or group normally lives or occurs






36. When a few individuals become isolated from a larger population - this smaller group may establish a new population whose gene pool is different from their source population.






37. Three dimensional shape of organism made from a mold. May be created with plaster or over time with minerals.






38. Consists of all genes - including all the different alleles - that are present in a population






39. DNA is made of...






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






41. The environmental factors that favour certain phenotypes






42. Change in a DNA sequence that affects genetic information






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






44. An episode of large - scale extinction affecting many different groups of organisms within a short period of time






45. A population partially isolated from other populations of the same species






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






47. The specific location of a gene on a chromosome






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






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






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