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






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






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






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






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






6. During transcription an RNA molecule is formed






7. A copy of a gene is made during a process called this






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






9. 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






10. 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.






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






12. The environmental factors that favour certain phenotypes






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






14. An organism that has characteristics resulting from chromosomal alteration. This is a result of crossing over of the chromosomes during Meiosis - mutations and random segregation.






15. Transfer RNA; type of RNA that carries amino acids to the ribosome






16. 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.






17. 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






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






19. Used radioactive sulfur and radioactive phosphorus to determine that DNA is the genetic material - by demonstrating that it is DNA that is injected by bacteriophages into bacterial cells during infection






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






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






22. A fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found






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






24. Form of reproductive isolation in which structural differences in the anatomy of reproductive organs prevent sperm transfer between individuals of different species






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






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






27. Dna moves during electrophoresis because of...






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






29. A unique combination of traits that are passed down from one generation to another.






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






31. Process in which DNA is duplicated






32. Selection for the ability to obtain a mate






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






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






35. Determined the concept of complementary base pairing






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






37. Process by which a ribosome uses the code on mRNA to make proteins






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






39. The movement of individuals into an area






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






41. Visual expression of a trait






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






43. A trait that masks the expression of another trait






44. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






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






46. Inherited feature that tends to prevent species from interbreeding with other species






47. Actual remains of an organism such as bones - teeth - shells - etc.






48. Transcrition occurs in the...






49. Is active during transcription






50. Trait where heterozygous is a blending of two alleles