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






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






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






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






5. Natural selection that causes the frequency of a particular allele to move in one direction






6. Different alleles for a gene






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






8. Type of rock made from small pieces of other rocks and organisms pressed together. Source of fossil preservation. Limited radioactive or absolute dating potential.






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






10. Group of similar organisms that can breed and produce fertile offspring






11. A limb with five digits (fingers)






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






13. Copying the code from DNA onto mRNA






14. 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






15. The evolutionary history/geneology of a group of organisms (a tree thingy)






16. Evolution of superficial phenotypic similarity of form as a result of similar selection pressures






17. Determined the concept of complementary base pairing






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






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






21. What happens during the process of translation






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






23. 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.






24. 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.






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






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






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






28. A nucleotide of RNA is made of...






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






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






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






32. Recognize and cut DNA at specific sequences usually palindromes






33. Gradual evolution within a lineage






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






35. Is a trait that is more expressed than another trait. Is written in capital letters for Genotype. E.g Tall genotype is TT or Tt where T is the allele for tall trait and t is the trait for small. T will be expressed more.






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






37. When competition causes two closely related species to become more different in regions where their ranges overlap






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






39. Predicts the possible outcome of a genetic cross.






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






41. DNA that is coiled around proteins






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






43. A group of organisms of the same species occupying a given area.






44. Describes the isolation of a physical barrier e.g. body of water (ocean) or mountains






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






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






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






49. 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.






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