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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. Three mRNA nucleotides that code for a specific amino acid






2. The adaptive increase in pigmentation as a result of human - induced pollutants






3. A nucleotide of RNA is made of...






4. An ancestor that two or more descendants have in common






5. Determined the concept of complementary base pairing






6. Selection acting against the extremes of a range of variation - resulting in resistance to change in allele frequencies






7. Selection for the ability to obtain a mate






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






9. The capacity of an individual of certain genotype to reproduce. It is usually equal to the proportion of the individual's genes in all the genes of the next generation






10. Evolution resulting from small specific genetic changes that can lead to a new subspecies






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






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






13. Ribosomes are made of...






14. Copying the code from DNA onto mRNA






15. Organisms with a similar underlying structure - but different function. Example: bird - bat and dolphin 'arm'. Shows a common ancestral link.






16. A change or error in the DNA sequence






17. Evolutionary process in which a species or related species folllow different evolutionary paths to eventually become less related






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






19. Organ that serves no useful function in an organism






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






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






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






23. Movement of organisms ro of from a population






24. The movement of genes between populations as a result of mating of migration






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






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






27. 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.






28. Ribosomal RNA; type of RNA that makes up part of the ribosome






29. What happens during the process of translation






30. Change in a DNA sequence that affects genetic information






31. Impression made from a organism in soft material such as sand or mud.






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






33. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






34. Which structure contains anticodons






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






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






37. 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






38. Individual that is heterozygous for two traits; shows the phenotype governed by the dominant alleles but carries the recessive alleles






39. T or F If a nucleic acid contain uracil it is DNA






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






41. Periods of little adaptive change






42. Hybrid is sterile so biologically unfit






43. Is any chromosome that is not a sex chromosome.






44. A limb with five digits (fingers)






45. The inherited characteristic often masked by the dominant characteristic and not seen in an organism. e.g. Tt plant will still be tall. Where T is the dominant trait for tall and t is the recessive trait for small.






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






47. A trait that masks the expression of another trait






48. Identical alleles for a gene






49. When F1 is fully fertile but F2 has low fertility (rice - cotton)






50. Situation in which allele frequencies remain constant