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






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






3. The complete genetic material contained in an individual






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






5. 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






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






7. A unique combination of traits that are passed down from one generation to another.






8. 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.






9. Organ no longer serves a function






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






11. A change or error in the DNA sequence






12. The final product of transcription is...






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






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






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






16. Actual remains of an organism such as bones - teeth - shells - etc.






17. Independent segregation of genes during the formation of gametes






18. Organ that serves no useful function in an organism






19. The comparison of the structures of different organisms






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






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






22. T or F a codon consist of three nucleotides






23. DNA that is coiled around proteins






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






25. What happens during the process of translation






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






27. A DNA strand that has the bases CTAATGT forms a complete complementary double helix with






28. Physical characteristics of an organism based on its genotype. e.g. Plant that has a genotype of TT will have a phenotype of Tall.






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






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






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






32. Name for oism with one dominant and one recessive allele






33. A trait that masks the expression of another trait






34. Because of base pairing in DNA the amount of






35. Describes the existence of a prezygotic reproductive barrier between two species as a result of them occupying or breeding in different habitats within the same general geographical area






36. Types of rocks formed after exposure to very high heat. Because of the high temperatures - fossils are not able to be recovered from these types of rocks. Absolute or radioactive dating is possible - however.






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






38. 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






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






40. Visual expression of a trait






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






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






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






44. Group of individuals of the same species that live in the same area






45. Copying the code from DNA onto mRNA






46. Structures in different but related species that are derived from the same ancestral structure but now serve different purposes.






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






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






49. Another name for a gene






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