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






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






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






4. Cell division that produces reproductive cells or gamates.This occurs in the gonads (testicle and ovaries in animals) Here the chromosome number is halved the original amount. (each new cell has a haploid number = n) All daughter cells are not geneti






5. A small simple structure (as a fertilized egg) from which new tissue can develop into a complete organism. It is also a cell






6. Science dealing with DNA and protein synthesis of living organisms. Manipulation of DNA.






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






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






9. 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.






10. Group of individuals of the same species that live in the same area






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






12. Describes the isolation of a physical barrier e.g. body of water (ocean) or mountains






13. Predicts the possible outcome of a genetic cross.






14. A DNA strand that has the bases CTAATGT forms a complete complementary double helix with






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






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






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






18. During transcription an RNA molecule is formed






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. Mating of 2 oism that differ in 2 characters






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






22. Determined the complete double helical structure of DNA






23. The inherited characteristic often masked by the dominant characteristic and not seen in an organism. e.g. Tt plant will still be tall. Where T is the dominant trait for tall and t is the recessive trait for small.






24. Recognize and cut DNA at specific sequences usually palindromes






25. When zygote does not complete development or is physically weaker than normal






26. How often a particular gene occurs in the population






27. Copying the code from DNA onto mRNA






28. Gradual evolution within a lineage






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






30. The environmental factors that favour certain phenotypes






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






32. 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.






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






34. Organ that serves no useful function in an organism






35. Two alternative forms of a gene e.g Tall vs Short






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






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






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






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






40. Is active during transcription






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






42. Cross where you cross unknown genotype with a recessive






43. 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.






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






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






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






47. A DNA double helix is held together in the center by between nitrogenous bases






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






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






50. Name for oism with one dominant and one recessive allele