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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. Organ no longer serves a function






2. Deoxyribonucleic acid carries the genetic code for the proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose) four bases Adenine - Thymine - Cytosine and Guanine. the sugar is bonded to a phosphate group. This forms a long






3. Process by which a ribosome uses the code on mRNA to make proteins






4. Selection for the ability to obtain a mate






5. Periods of little adaptive change






6. Gene

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7. Chromosomes are collections of many






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






9. The movement of genes between populations as a result of mating of migration






10. Mutation where an extra base is added






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






12. Type of sympatric speciation that occurs when a new species is formed because of a change in microhabitats






13. Hybrid is sterile so biologically unfit






14. The final product of transcription is...






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






16. Which structure contains anticodons






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






18. DNA that is coiled around proteins






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






20. A distinct population of a species that varies from other populations of the same species.






21. 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






22. 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.






23. Middle life (245-144 million years ago); rise of mammals and dinosaurs; the rise of birds; extinction of dinosaurs - rise of flowering plants






24. The signal on a mRNA molecule that designates the end of the coding sequence is called the...






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






26. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






27. 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.






28. A group of organisms of the same species occupying a given area.






29. Cross where you cross unknown genotype with a recessive






30. 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.






31. A trait that masks the expression of another trait






32. The enzyme that binds to the promoter region of a gene during transcription is called...






33. An equilibrium in the occurence of two or more different froms within the same population usually caused by different allele combiinations of a gene






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






35. 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






36. Determined the concept of complementary base pairing






37. The backbone of DNA consist of...






38. Translation occurs in the...






39. A pairing where the parent plants differ in only one character.






40. 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.






41. The independant evolution of similar traits - starting from a similar ancestral condition






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






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






44. Disappearance of a species from all parts of its geographical range






45. Organ that serves no useful function in an organism






46. What is one benefit for having two strands of DNA?






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






48. T or F If a nucleic acid contain uracil it is DNA






49. Which type of Rna functions as a blue print of the genetic code






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