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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. Independent segregation of genes during the formation of gametes






2. Change to a chromosome in which part of the chromosome is repeated






3. A base found in DNA (but not in RNA). This base pairs with Adenine.






4. Movement of organisms ro of from a population






5. Is a sequence of DNA that codes for a protein and thus determines a trait. This is because the sequence of bases code for certain proteins.






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






7. 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






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






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






10. A genetic crosses that involve one trait. e.g TT plant crossed with tt plant has offspring who are heterozygous Tt.






11. Mutation where an extra base is added






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






13. Another name for a gene






14. Cross where you cross unknown genotype with a recessive






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






16. Because of base pairing in DNA the amount of






17. Trait where heterozygous is a blending of two alleles






18. Predicts the possible outcome of a genetic cross.






19. Gradual evolution within a lineage






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






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






22. Change to a chromosome in which a fragment of one chromosome attaches to a nonhomologous chromosome






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






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






25. 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.






26. Gene

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






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






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






30. 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






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






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






33. 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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34. Situation in which allele frequencies remain constant






35. How often a particular gene occurs in the population






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






37. Genes contain instructions for assembling






38. Innate trait; shared ancestry






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






40. A change in the base sequence of a gene






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






42. 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.






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






44. A type of protein molecule found in the chromosomes of eukaryotic cells but not prokaryotic cells






45. Mating of 2 oism that differ in 2 characters






46. A DNA double helix is held together in the center by between nitrogenous bases






47. Visual expression of a trait






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






49. Proteins are made of...






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