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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. Is any chromosome that is not a sex chromosome.






2. 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.






3. Similar embryological structures in different species - such as gill slits - may demonstrate that these species share a common ancestor.






4. Copying the code from DNA onto mRNA






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






6. 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.






7. Change in a DNA sequence that affects genetic information






8. Chromosomes that determine the sex of an individual. These are X for female and Y for male. The female egg is an X while the male sperm can be X or Y






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






10. Mutation where an extra base is added






11. Transcrition occurs in the...






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






13. Selection for the ability to obtain a mate






14. Organ no longer serves a function






15. Features that are superficially similar but have different modes of development






16. Independent segregation of genes during the formation of gametes






17. Proteins are made of...






18. A limb with five digits (fingers)






19. Cell division that produces reproductive cells or gamates.This occurs in the gonads (testicle and ovaries in animals) Here the chromosome number is halved the original amount. (each new cell has a haploid number = n) All daughter cells are not geneti






20. Gene

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21. The adaptive increase in pigmentation as a result of human - induced pollutants






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






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






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






25. An episode of large - scale extinction affecting many different groups of organisms within a short period of time






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






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






28. 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.






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






30. The study of the past and present distribution of species.






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






32. Determined the concept of complementary base pairing






33. Ribosomes are made of...






34. The specific location of a gene on a chromosome






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






36. During transcription an RNA molecule is formed






37. Earth's history organized into four eras: Precambrian - Paleozoic - Mesozoic - and Cenozoic






38. 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






39. Physical characteristics of an organism based on its genotype. e.g. Plant that has a genotype of TT will have a phenotype of Tall.






40. A trait that masks the expression of another trait






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






42. Situation in which allele frequencies remain constant






43. Identical alleles for a gene






44. The complete genetic material contained in an individual






45. A type of barrier between species; the species remain isolated because male and femal gametes of the different species cannot fuse - or they die before they unite.






46. 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.






47. 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






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






49. 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.






50. Found only in that country