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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 number of times an allele appears in a population






2. 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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3. Periods of little adaptive change






4. Is active during transcription






5. Term used to refer to an organism that has two identical alleles for a particular trait. e.g TT is the homozygous genotype for Tall.






6. What happens during the process of translation






7. Found only in that country






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






9. Is a base found in DNA and RNA. This base pairs with Cytosine in DNA






10. Cross where you cross unknown genotype with a recessive






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






12. The complete genetic material contained in an individual






13. The gradual changes in gene frequencies in a population due to random events






14. Another name for a gene






15. T or F A cloned organism has the same proteins as another organism






16. 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.






17. Disappearance of a species from all parts of its geographical range






18. Any preserved remains of an organism from the past. Usually found in sedimentary rock.






19. Periods of rapid evolution punctuated by periods of little change






20. A codon is made of...






21. Organisms with similar functions - but different underlying structure. Example: bird and insect wing. These structures do NOT show a common ancestral link.






22. Process by which a ribosome uses the code on mRNA to make proteins






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






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






25. Dna moves during electrophoresis because of...






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






27. It means chromosomes are paired. One of each chromosome in a pair originates from the father and one from the mother. They affect the same trait - but don't necessarily cause the same expression of the trait.






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






29. Another term for pure breeding






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






31. Populations that can interbreed with neighboring populations but not with populations separated by larger geographical distances






32. Are noncoding sequences in the gene that are removed from RNA after transcription






33. Speciation preceded by a period of geographical isolation






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






35. DNA is made of...






36. Movement of organisms ro of from a population






37. The reduction of a population - typically by a natural disaster - such that the surviving population is no longer genetically representative of the original population.






38. Because of base pairing in DNA the amount of






39. A change in the base sequence of a gene






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






41. Independent segregation of genes during the formation of gametes






42. A type of barrier between species; the species remain isolated because male and femal gametes of the different species cannot fuse - or they die before they unite.






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






44. The structure on a tRNA molecule that allows it interact with an mRNA molecule






45. Genes contain instructions for assembling






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






47. The gradual changes in gene frequencies in a population due to random events






48. Organ no longer serves a function






49. Separates DNA by size






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