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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. Selection for the ability to obtain a mate






2. Pea plants






3. Similar embryological structures in different species - such as gill slits - may demonstrate that these species share a common ancestor.






4. It is the time from when the Earth formed and simple life - forms evolved (and it is the longest era)






5. Structures in different but related species that are derived from the same ancestral structure but now serve different purposes.






6. Type of sympatric speciation that occurs when a new species is formed because of a change in microhabitats






7. Features of different species tat are similar in function but not necessarily in structure and in which the similarity is not the result of common ancestry






8. Organ no longer serves a function






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






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






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






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






13. A mutation in which one nucleotide is replaced by another nucleotide






14. Movement of alleles into or out of a population due to the migration of individuals to or from the population






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






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






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






18. An equilibrium in the occurence of two or more different froms within the same population usually caused by different allele combiinations of a gene






19. What happens during the process of translation






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






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. Mating of an individual of unknown genotype but dominant phenotype w/ a homozygous recessive individual






23. A change in the base sequence of a gene






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






25. 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.






26. Another term for pure breeding






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






28. The condition in which there is no change in allele frequencies from generation to generation (i.e. no evolution)






29. 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.






30. Building block of a nucleic acid (DNA and RNA)






31. The backbone of DNA consist of...






32. Another name for a gene






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






34. Copying the code from DNA onto mRNA






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






36. What does DNA stand for...






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






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






39. A geographic gradient in the extent to which a character is developed in a species






40. Geologic period that followed the Precambrian;means 'ancient life' - early life (570-286 million years ago); single cell organisms - shells - mollusks - rise of first vertebrates - rise of land plants - amphibians - insects - seed plants - and trees






41. One of the identical rods of a chromosome.






42. The signal on a mRNA molecule that designates the end of the coding sequence is called the...






43. Gene

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






45. Term used to refer to an organism that has two different alleles for the same trait. e.g Tt is the heterozygous genotype for Tall.






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






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






48. 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.






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






50. Dna moves during electrophoresis because of...