Test your basic knowledge |

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






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






3. Independent segregation of genes during the formation of gametes






4. 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.






5. The molecules responsible for bringing amino acids to the ribosome during protein synthesis are






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






7. The condition in which there is no change in allele frequencies from generation to generation (i.e. no evolution)






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






9. 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






10. How many codons are needed to specify three amino acids






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






12. Movement of organisms ro of from a population






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






14. Trait evolves overtime; NO common ancestry






15. 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






16. A model for the evolution of different froms over a long period of time but with only slight chchanges occring between successive generations






17. Transcrition occurs in the...






18. Evolutionary process in which a species or related species folllow different evolutionary paths to eventually become less related






19. Pea plants






20. A combining of genes or characters different from what they were in the parents






21. The preserved remains or traces of an organism that lived in the past






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






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






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






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






26. A limb with five digits (fingers)






27. Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest






28. Determined the concept of complementary base pairing






29. The backbone of DNA consist of...






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






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






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






33. DNA is made of...






34. It is the time from when the Earth formed and simple life - forms evolved (and it is the longest era)






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






36. Uses metamorphic or igneous rock - calculates the age of an object by assessing the amount of radioactive element still present in the organism. Radioactive elements are slowly lost over time because of decay.






37. How often a particular gene occurs in the population






38. A change in the base sequence of a gene






39. Proteins are made of...






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






41. 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.






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






43. Describes a cell - nucleus - or organism that has only one set of unpaired chromosomes






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






45. Structure present in an organism however does NOT have a known function. May link organisms with similar vestigial structures. Example: appendix - coccyx bone - whale leg bones.






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






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






48. Change to a chromosome in which a fragment of the chromosome is removed






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






50. Embryos of similar organisms have very similar early development indicating similar DNA at work