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






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






3. Uses metamorphic or igneous rock - calculates the age of an object by assessing the amount of radioactive element still present in the organism. Radioactive elements are slowly lost over time because of decay.






4. Gradual evolution within a lineage






5. Which structure contains anticodons






6. 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.






7. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






8. Form of reproductive isolation in which two populations reproduce at different times






9. The environmental factors that favour certain phenotypes






10. Another name for a gene






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






12. A population partially isolated from other populations of the same species






13. A change or error in the DNA sequence






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






15. 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






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






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






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






19. DNA that is coiled around proteins






20. Dna moves during electrophoresis because of...






21. The region of the chromosome that holds the two sister chromatids together during mitosis






22. Periods of little adaptive change






23. Cell division in which the nucleus divides into nuclei containing the same number of chromosomes. Mitosis involves growth and repair and occurs in the body cells.






24. 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.






25. Selection for the ability to obtain a mate






26. All the factors in an organism's surroundings that can potentially affect it






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






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






29. Selection acting against the middle of a range of variation






30. 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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31. 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.






32. The comparison of the structures of different organisms






33. DNA is made of...






34. The enzyme that binds to the promoter region of a gene during transcription is called...






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






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






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






38. Movement of organisms ro of from a population






39. A model for the evolution of different froms over a long period of time but with only slight chchanges occring between successive generations






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






41. How many codons are needed to specify three amino acids






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






43. The sum total of an organism's requirements; its way of life






44. 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






45. Transcrition occurs in the...






46. 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.






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






48. Process by which one species gives rise to two or more species






49. The movement of individuals into an area






50. Deoxyribonucleic acid carries the genetic code for the proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose) four bases Adenine - Thymine - Cytosine and Guanine. the sugar is bonded to a phosphate group. This forms a long