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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. 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.






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






3. Determined the complete double helical structure of DNA






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






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






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






7. What does DNA stand for...






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






9. Because of base pairing in DNA the amount of






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






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






12. Different alleles for a gene






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






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






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






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






17. The independant evolution of similar traits - starting from a similar ancestral condition






18. 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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19. 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.






20. Structures in different but related species that are derived from the same ancestral structure but now serve different purposes.






21. A change or error in the DNA sequence






22. Is found in DNA






23. Large - scale evolutionary changes that take place over long periods of time






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






25. Evolutionary process in which a species or related species folllow different evolutionary paths to eventually become less related






26. The complete genetic material contained in an individual






27. The final product of transcription is...






28. Periods of little adaptive change






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






30. The number of times an allele appears in a population






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






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






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






34. Determined the concept of complementary base pairing






35. The condition in which there is no change in allele frequencies from generation to generation (i.e. no evolution)






36. Speciation preceded by a period of geographical isolation






37. Any agent that can cause a change in DNA






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






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






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






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






42. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






43. The adaptive increase in pigmentation as a result of human - induced pollutants






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






45. Visual expression of a trait






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






47. T or F a codon consist of three nucleotides






48. Another term for pure breeding






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






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