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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. Speciation which does not involve a period of geographical separation






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






3. 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.






4. A codon is made of...






5. 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.






6. Change to a chromosome in which a fragment of one chromosome attaches to a nonhomologous chromosome






7. 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.






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






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






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






11. Selection for the ability to obtain a mate






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






13. Are noncoding sequences in the gene that are removed from RNA after transcription






14. What happens during the process of translation






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






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






17. The final product of transcription is...






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






19. A group of organisms whose members are sufficiently alike to be able to reproduce and produce fertile offspring and who are unable to reproduce with other such groups






20. Identical alleles for a gene






21. Innate trait; shared ancestry






22. Natural disaster eliminates most of the population - members left contribute the alleles for the new population.






23. Human - like species that existed millions of years ago as witnessed through fossil evidence.






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






25. The evolutionary history/geneology of a group of organisms (a tree thingy)






26. 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.






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






28. Chromosomes are collections of many






29. Closely related species occupying different habitats - niches preventing them from interbreeding






30. Found only in that country






31. Genes contain instructions for assembling






32. Visual expression of a trait






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






34. Movement of alleles into or out of a population due to the migration of individuals to or from the population






35. 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.






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






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






38. 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






39. The backbone of DNA consist of...






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






41. Cross where you cross unknown genotype with a recessive






42. 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.






43. Trait evolves overtime; NO common ancestry






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






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






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






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






48. Situation in which allele frequencies remain constant






49. Method of replication that implies that each new strand of DNA is half original and half new






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