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






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






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






4. 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.






5. Is found in DNA






6. 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






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






8. Populations that can interbreed with neighboring populations but not with populations separated by larger geographical distances






9. The specific location of a gene on a chromosome






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






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






12. The comparison of the structures of different organisms






13. Condition in which an organism has extra sets of chromosomes






14. When a few individuals become isolated from a larger population - this smaller group may establish a new population whose gene pool is different from their source population.






15. 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.






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






17. The study relating the evolution of new charateristics to changes in the genes controlling development






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






19. Organ no longer serves a function






20. Chromosomes are collections of many






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






22. Organ that serves no useful function in an organism






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






24. Features of different species tat are similar in function but not necessarily in structure and in which the similarity is not the result of common ancestry






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






26. Two alternative forms of a gene e.g Tall vs Short






27. Movement of organisms ro of from a population






28. Organism is preserved at very low temperatures. Preservation of both hard and soft parts can occur.






29. Process by which one species gives rise to two or more species






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






31. Individual that is heterozygous for two traits; shows the phenotype governed by the dominant alleles but carries the recessive alleles






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






33. One of the identical rods of a chromosome.






34. Evolution resulting from small specific genetic changes that can lead to a new subspecies






35. Speciation preceded by a period of geographical isolation






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






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






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






39. A body cell






40. All the factors in an organism's surroundings that can potentially affect it






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






42. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






43. Dna moves during electrophoresis because of...






44. Determined the complete double helical structure of DNA






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






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






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






50. T or F a codon consist of three nucleotides