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






2. The complete genetic material contained in an individual






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






4. Proteins are made of...






5. Is the evolutionary process whereby a population becomes better suited to its habitat






6. Organ no longer serves a function






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






8. 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.






9. A process that results in an allele having a different probability of remaining in the gene pool compared with that of another allele






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






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






12. The study of the past and present distribution of species.






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






14. During transcription an RNA molecule is formed






15. 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.






16. The environmental factors that favour certain phenotypes






17. Gradual evolution within a lineage






18. 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






19. An episode of large - scale extinction affecting many different groups of organisms within a short period of time






20. The individuals choice of which mate they will choose. The choice is dependant on what traits the individual finds attractive. e.g some people will want their mates to be smart or pretty.






21. A fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found






22. Determined the complete double helical structure of DNA






23. A unique combination of traits that are passed down from one generation to another.






24. Natural disaster eliminates most of the population - members left contribute the alleles for the new population.






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






26. Selection against one end of a range of variation - resulting in a progressive change in allele frequency






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






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






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






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






31. A codon is made of...






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






33. The movement of individuals into an area






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






35. Three mRNA nucleotides that code for a specific amino acid






36. Which structure contains anticodons






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






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






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






40. Because of base pairing in DNA the amount of






41. Predicts the possible outcome of a genetic cross.






42. Another name for a gene






43. 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






44. Form of reproductive isolation in which tere are differences in species courtship behavior






45. Independent segregation of genes during the formation of gametes






46. 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.






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






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






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






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