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






2. DNA that is coiled around proteins






3. Which structure contains anticodons






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






5. A distinct population of a species that varies from other populations of the same species.






6. Cross where you cross unknown genotype with a recessive






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






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






9. 2 alleles for a character separate during the formation of gametes - so that each gamete only carriers one allele for each character

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10. Another name for a gene






11. Is active during transcription






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






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






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






15. Different alleles for a gene






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






17. 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






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






19. During transcription an RNA molecule is formed






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






21. How often a form of a gene appears in a gene pool






22. Is a base found in DNA and RNA. Cytosine pairs with Guanine in DNA






23. T or F a codon consist of three nucleotides






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






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






26. Disappearance of a species from all parts of its geographical range






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






28. 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






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






30. Periods of little adaptive change






31. 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.






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






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






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






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






36. Mating of an individual of unknown genotype but dominant phenotype w/ a homozygous recessive individual






37. Dna moves during electrophoresis because of...






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






39. 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.






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






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






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






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






44. 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.






45. 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.






46. The movement of individuals into an area






47. The study of the structures of different organisms - looking at homologous parts






48. Building block of a protein






49. A change in the base sequence of a gene






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