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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. 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.






2. 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.






3. Method of replication that implies that each new strand of DNA is half original and half new






4. Recognize and cut DNA at specific sequences usually palindromes






5. Messenger RNA; type of RNA that carries instructions from DNA in the nucleus to the ribosome






6. Determined the complete double helical structure of DNA






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






8. Heteros have a phenotype tintertmediate b/t phenotypes of the 2 homoz






9. How often a form of a gene appears in a gene pool






10. A distinct population of a species that varies from other populations of the same species.






11. 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






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






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






14. Independent segregation of genes during the formation of gametes






15. Separates DNA by size






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






17. Any indirect evidence of life preserved as an impression in rock; trails - footprints - tracks - burrows - and bite marks






18. Found only in that country






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






20. In the event of a sperm fertilizing an egg of another species - mechanisms that prevent result being fruitful






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






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






23. Organ no longer serves a function






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






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






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






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






28. 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.






29. Copying the code from DNA onto mRNA






30. The movement of individuals into an area






31. Three dimensional shape of organism made from a mold. May be created with plaster or over time with minerals.






32. Change to a chromosome in which part of the chromosome is repeated






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






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






35. 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.






36. 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.






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






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






39. Proteins are made of...






40. The complete genetic material contained in an individual






41. The number of times an allele appears in a population






42. 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.






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






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






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






46. Mating of 2 oism that differ in 2 characters






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






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






49. 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.






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