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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. Determined the concept of complementary base pairing






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






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






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






5. Is the genetic makeup of an organism (TT or Tt) ; All the combinations of genes you have for a certain trait.






6. A geographic gradient in the extent to which a character is developed in a species






7. Periods of little adaptive change






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






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






10. 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.






11. 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






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






13. One of the identical rods of a chromosome.






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






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






16. The inherited characteristic often masked by the dominant characteristic and not seen in an organism. e.g. Tt plant will still be tall. Where T is the dominant trait for tall and t is the recessive trait for small.






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






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






20. A nucleotide of RNA is made of...






21. Process by which an organism is slowly turned to stone as the body is replaced by minerals.






22. DNA is made of...






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






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






25. Ribosomal RNA; type of RNA that makes up part of the ribosome






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






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






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






29. Building block of a protein






30. Messenger RNA; type of RNA that carries instructions from DNA in the nucleus to the ribosome






31. 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






32. Building block of a nucleic acid (DNA and RNA)






33. Any agent that can cause a change in DNA






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






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






36. The type of environment in which an organism or group normally lives or occurs






37. The backbone of DNA consist of...






38. Gene

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39. Trait where heterozygous is a blending of two alleles






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






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






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






43. 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.






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






45. A population partially isolated from other populations of the same species






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






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






48. Describes the existence of a prezygotic reproductive barrier between two species as a result of them occupying or breeding in different habitats within the same general geographical area






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






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







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