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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. 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.






3. A codon is made of...






4. Another term for pure breeding






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






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






7. Innate trait; shared ancestry






8. The banding pattern of a persons DNA after being cut and run on gel is called






9. Speciation preceded by a period of geographical isolation






10. Change in a DNA sequence that affects genetic information






11. Mating of 2 oism that differ in 2 characters






12. An organism that has characteristics resulting from chromosomal alteration. This is a result of crossing over of the chromosomes during Meiosis - mutations and random segregation.






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






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






15. You mate the unknown genotype with an organism showing the recessive trait. If any of the offspring show the recessive trait - the original unknown parent was heterozygous. If no recessive trats show up - the original parent was homozygous.






16. Heteros have a phenotype tintertmediate b/t phenotypes of the 2 homoz






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






18. Found only in that country






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






20. Pea plants






21. The complete genetic material contained in an individual






22. Situation in which allele frequencies remain constant






23. 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






24. Separates DNA by size






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






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






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






28. The movement of genes between populations as a result of mating of migration






29. Periods of little adaptive change






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






31. Relatively rapid proliferation from an ancestral type into new types which fill a diversity of ecological niches






32. Determined the concept of complementary base pairing






33. 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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34. Organ that serves no useful function in an organism






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






36. 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.






37. A type of natural selection in which genetic diversity decreases as the population stabilises on a particular trait value






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






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






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






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






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






43. 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.






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






45. 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






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






47. Is a trait that is more expressed than another trait. Is written in capital letters for Genotype. E.g Tall genotype is TT or Tt where T is the allele for tall trait and t is the trait for small. T will be expressed more.






48. What does DNA stand for...






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






50. The study of the structures of different organisms - looking at homologous parts






Can you answer 50 questions in 15 minutes?



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