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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. Cross where you cross unknown genotype with a recessive






2. Selection acting against the extremes of a range of variation - resulting in resistance to change in allele frequencies






3. Middle life (245-144 million years ago); rise of mammals and dinosaurs; the rise of birds; extinction of dinosaurs - rise of flowering plants






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






5. Copying the code from DNA onto mRNA






6. Change in a DNA sequence that affects genetic information






7. Evolution of the earth - which is hypothesized to have been formed over 4.6 billion years ago.






8. Determined the complete double helical structure of DNA






9. Another term for pure breeding






10. The specific location of a gene on a chromosome






11. T or F a codon consist of three nucleotides






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






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






14. Structures in different but related species that are derived from the same ancestral structure but now serve different purposes.






15. Process in which DNA is duplicated






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






17. Form of reproductive isolation in which two populations reproduce at different times






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






19. Periods of little adaptive change






20. When zygote does not complete development or is physically weaker than normal






21. Ribosomes are made of...






22. Recognize and cut DNA at specific sequences usually palindromes






23. Any preserved remains of an organism from the past. Usually found in sedimentary rock.






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






25. 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.






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






27. The environmental factors that favour certain phenotypes






28. Predicts the possible outcome of a genetic cross.






29. Types of rocks formed after exposure to very high heat. Because of the high temperatures - fossils are not able to be recovered from these types of rocks. Absolute or radioactive dating is possible - however.






30. Any agent that can cause a change in DNA






31. Mating of 2 oism that differ in 2 characters






32. A change or error in the DNA sequence






33. 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






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






35. Identical alleles for a gene






36. Genes contain instructions for assembling






37. 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.






38. The formation of new species as a result of evolution






39. Change of an organism over time. This can be caused by changes in in habitat or need to adapt for survival.






40. A nucleotide of RNA is made of...






41. 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.






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






43. The final product of transcription is...






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






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






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






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






48. Pea plants






49. Impression made from a organism in soft material such as sand or mud.






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