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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. Mutation where an extra base is added






2. 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






3. An evolutionary 'branch' and its daughter 'twigs'






4. Is active during transcription






5. The final product of transcription is...






6. Determined the complete double helical structure of DNA






7. Geologic period that followed the Precambrian;means 'ancient life' - early life (570-286 million years ago); single cell organisms - shells - mollusks - rise of first vertebrates - rise of land plants - amphibians - insects - seed plants - and trees






8. Which structure contains anticodons






9. Independent segregation of genes during the formation of gametes






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






11. Evolution of superficial phenotypic similarity of form as a result of similar selection pressures






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






13. In the event of a sperm fertilizing an egg of another species - mechanisms that prevent result being fruitful






14. An ancestor that two or more descendants have in common






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






16. DNA is made of...






17. Movement of organisms ro of from a population






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






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






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






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






22. Gradual evolution within a lineage






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






24. How often a form of a gene appears in a gene pool






25. The backbone of DNA consist of...






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






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






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






29. One of the identical rods of a chromosome.






30. 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






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






32. 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.






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






34. 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






35. 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.






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






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. A type of protein molecule found in the chromosomes of eukaryotic cells but not prokaryotic cells






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






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






41. When competition causes two closely related species to become more different in regions where their ranges overlap






42. The number of times an allele appears in a population






43. Transcrition occurs in the...






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






45. It means chromosomes are paired. One of each chromosome in a pair originates from the father and one from the mother. They affect the same trait - but don't necessarily cause the same expression of the trait.






46. Mating of 2 oism that differ in 2 characters






47. Translation occurs in the...






48. What does DNA stand for...






49. 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.






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







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