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






2. Three dimensional shape of organism made from a mold. May be created with plaster or over time with minerals.






3. Large - scale evolutionary changes that take place over long periods of time






4. Change in allele frequencies as a result of the migration of a small subgroup of a population






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






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






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






8. Different alleles for a gene






9. 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.






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






11. T or F a codon consist of three nucleotides






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






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






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






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






16. One of the types of fossils made from hardened tree resin. Preserves both hard and soft parts.






17. Group of individuals of the same species that live in the same area






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






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






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






21. Layers of compressed sedimentary rock demonstrate the order or sequence at which events occurred. Cannot delineate the exact point of time - but is able to distinguish the order of events.






22. 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.






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






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






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






26. A process that results in an allele having a different probability of remaining in the gene pool compared with that of another allele






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






28. Building block of a protein






29. Trait where heterozygous is a blending of two alleles






30. Chromosomes are collections of many






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






32. 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.






33. The specific location of a gene on a chromosome






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






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






36. Term used to refer to an organism that has two identical alleles for a particular trait. e.g TT is the homozygous genotype for Tall.






37. Is found in DNA






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






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






40. Pea plants






41. The comparison of the structures of different organisms






42. A trait that masks the expression of another trait






43. Found only in that country






44. Determined the concept of complementary base pairing






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






46. Selection acting against the middle of a range of variation






47. Is any chromosome that is not a sex chromosome.






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






49. The signal on a mRNA molecule that designates the end of the coding sequence is called the...






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