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






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






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






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






5. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






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






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






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






9. Chromosomes are collections of many






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






11. The environmental factors that favour certain phenotypes






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






13. Building block of a protein






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






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






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






17. Copying the code from DNA onto mRNA






18. A codon is made of...






19. Used x ray cyrstallography to create an image of DNA






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






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






22. The final product of transcription is...






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






24. Populations that can interbreed with neighboring populations but not with populations separated by larger geographical distances






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






26. A point of overlap of paired chromatids at which fusion and exchange of genetic material (crossing over) occurs during prophase I of meiosis.






27. What is one benefit for having two strands of DNA?






28. The evolutionary process by which a species becomes better suited to its niche.






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






30. 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.






31. Mating of 2 oism that differ in 2 characters






32. These prevent fertilization between species e.g. diff breeding season - mating behaviour






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






34. Hybrid is sterile so biologically unfit






35. An evolutionary 'branch' and its daughter 'twigs'






36. Proteins are made of...






37. Consists of all genes - including all the different alleles - that are present in a population






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






39. A limb with five digits (fingers)






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






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






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






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






44. A process where the organisms that have traits that aid in its survival (adaptive traits) will reproduce to pass that trait to futher generations thus increasing the frequency of that trait in the population. Vice versa traits that reduce the chance






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






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






47. Different alleles for a gene






48. The movement of individuals into an area






49. One of the identical rods of a chromosome.






50. What does DNA stand for...