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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. A change or error in the DNA sequence






2. Molecules that join together to form DNA and RNA. Monomers that make up a nucleic acid






3. Ribosomes are made of...






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






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






6. Trait evolves overtime; NO common ancestry






7. Change in a DNA sequence that affects genetic information






8. Threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next






9. Name for oism with one dominant and one recessive allele






10. Change in allele frequencies as a result of the migration of a small subgroup of a population






11. Large - scale evolutionary changes that take place over long periods of time






12. Earth's history organized into four eras: Precambrian - Paleozoic - Mesozoic - and Cenozoic






13. A body cell






14. Gene

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15. The study relating the evolution of new charateristics to changes in the genes controlling development






16. The structure on a tRNA molecule that allows it interact with an mRNA molecule






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






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






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






20. Innate trait; shared ancestry






21. Hybrid is sterile so biologically unfit






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






23. An episode of large - scale extinction affecting many different groups of organisms within a short period of time






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






25. 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.






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






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






28. The environmental factors that favour certain phenotypes






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






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






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






32. Separation of species or populations so that they cannot interbreed and produce fertile offspring






33. The study of the past and present distribution of species.






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






35. The independant evolution of similar traits - starting from a similar ancestral condition






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






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






38. A group of organisms whose members are sufficiently alike to be able to reproduce and produce fertile offspring and who are unable to reproduce with other such groups






39. Change of an organism over time. This can be caused by changes in in habitat or need to adapt for survival.






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






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






42. Gradual evolution within a lineage






43. Deoxyribonucleic acid carries the genetic code for the proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose) four bases Adenine - Thymine - Cytosine and Guanine. the sugar is bonded to a phosphate group. This forms a long






44. Evolution of the earth - which is hypothesized to have been formed over 4.6 billion years ago.






45. You mate the unknown genotype with an organism showing the recessive trait. If any of the offspring show the recessive trait - the original unknown parent was heterozygous. If no recessive trats show up - the original parent was homozygous.






46. Periods of rapid evolution punctuated by periods of little change






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






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






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






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