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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. Mutation where an extra base is added






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






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






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






5. During transcription an RNA molecule is formed






6. Organ that serves no useful function in an organism






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






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






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






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






11. Mating of 2 oism that differ in 2 characters






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






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






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






15. Visual expression of a trait






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






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






18. Form of reproductive isolation in which structural differences in the anatomy of reproductive organs prevent sperm transfer between individuals of different species






19. 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






20. Inherited feature that tends to prevent species from interbreeding with other species






21. 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.






22. The offspring of a cross between two inbred lines within a single species. May also refer to the offspring of across between two species






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






24. Ribosomes are made of...






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






26. Evolution of living things - based on evidence from the past and present.






27. A codon is made of...






28. T or F If a nucleic acid contain uracil it is DNA






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






30. Dna moves during electrophoresis because of...






31. Identical alleles for a gene






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






33. 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






34. The environmental factors that favour certain phenotypes






35. Separates DNA by size






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






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






38. Is a sequence of DNA that codes for a protein and thus determines a trait. This is because the sequence of bases code for certain proteins.






39. Situation in which allele frequencies remain constant






40. A group of organisms whose members are sufficiently alike to be able to reproduce and produce fertile offspring and who are unable to reproduce with other such groups






41. A nucleotide of RNA is made of...






42. Change to a chromosome in which a fragment of the chromosome is removed






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






44. 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.






45. Chromosomes are collections of many






46. Another term for pure breeding






47. Era of recent life that began about 66 million years ago and continues today; includes the first appearance Hominids






48. One of the types of fossils made from hardened tree resin. Preserves both hard and soft parts.






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






50. The movement of individuals into an area