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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. Which structure contains anticodons






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






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






4. A change or error in the DNA sequence






5. Hybrid is sterile so biologically unfit






6. Translation occurs in the...






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






8. Organisms with similar functions - but different underlying structure. Example: bird and insect wing. These structures do NOT show a common ancestral link.






9. A genetic crosses that involve one trait. e.g TT plant crossed with tt plant has offspring who are heterozygous Tt.






10. Organisms with a similar underlying structure - but different function. Example: bird - bat and dolphin 'arm'. Shows a common ancestral link.






11. Chromosomes are collections of many






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






13. The reduction of a population - typically by a natural disaster - such that the surviving population is no longer genetically representative of the original population.






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






15. Structure present in an organism however does NOT have a known function. May link organisms with similar vestigial structures. Example: appendix - coccyx bone - whale leg bones.






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






17. Separates DNA by size






18. The specific location of a gene on a chromosome






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






20. Building block of a protein






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






22. The evolutionary process by which a species becomes better suited to its niche.






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






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






25. What happens during the process of translation






26. Because of base pairing in DNA the amount of






27. 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.






28. Genes contain instructions for assembling






29. Determined the concept of complementary base pairing






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






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






32. Nucleotides that control which amino acids are added during protein synthesis






33. The capacity of an individual of certain genotype to reproduce. It is usually equal to the proportion of the individual's genes in all the genes of the next generation






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






35. Is found in DNA






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






37. Cell division in which the nucleus divides into nuclei containing the same number of chromosomes. Mitosis involves growth and repair and occurs in the body cells.






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






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






40. Selection acting against the extremes of a range of variation - resulting in resistance to change in allele frequencies






41. A taxon originating from and including a single common ancestor






42. Another name for a gene






43. Is active during transcription






44. T or F a codon consist of three nucleotides






45. Change in a DNA sequence that affects genetic information






46. Proteins are made of...






47. 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.






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






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






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