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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 structure on a tRNA molecule that allows it interact with an mRNA molecule






2. Visual expression of a trait






3. Transfer RNA; type of RNA that carries amino acids to the ribosome






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






5. Change to a chromosome in which part of the chromosome is repeated






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






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






8. A type of natural selection in which genetic diversity decreases as the population stabilises on a particular trait value






9. These prevent fertilization between species e.g. diff breeding season - mating behaviour






10. The inherited characteristic often masked by the dominant characteristic and not seen in an organism. e.g. Tt plant will still be tall. Where T is the dominant trait for tall and t is the recessive trait for small.






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






12. A change in the base sequence of a gene






13. The condition in which there is no change in allele frequencies from generation to generation (i.e. no evolution)






14. During transcription an RNA molecule is formed






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






16. 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.






17. 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






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






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






20. Chromosomes are collections of many






21. Describes the isolation of a physical barrier e.g. body of water (ocean) or mountains






22. Synonym for protein; chain of amino acids






23. Is a base found in DNA and RNA. This base pairs with Cytosine in DNA






24. A copy of a gene is made during a process called this






25. Movement of organisms ro of from a population






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






27. Independent segregation of genes during the formation of gametes






28. Relatively rapid proliferation from an ancestral type into new types which fill a diversity of ecological niches






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






30. To create a recombinant DNA molecule - one would have to first cut two DNAs with creating before pasting them together






31. The comparison of the structures of different organisms






32. Because of base pairing in DNA the amount of






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






34. A change or error in the DNA sequence






35. The molecules responsible for bringing amino acids to the ribosome during protein synthesis are






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






37. Cross where you cross unknown genotype with a recessive






38. Which structure contains anticodons






39. 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.






40. The final product of transcription is...






41. Three mRNA nucleotides that code for a specific amino acid






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






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






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






45. Inherited feature that tends to prevent species from interbreeding with other species






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






47. Process in which DNA is duplicated






48. Breeding organisms with specific traits in order to produce offspring with identical traits






49. Trait where heterozygous is a blending of two alleles






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