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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 A cloned organism has the same proteins as another organism






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






3. Separation of species or populations so that they cannot interbreed and produce fertile offspring






4. Is found in DNA






5. A change or error in the DNA sequence






6. Identical alleles for a gene






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






8. A combining of genes or characters different from what they were in the parents






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






10. Describes a cell - nucleus - or organism that has only one set of unpaired chromosomes






11. Visual expression of a trait






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






13. Cross where you cross unknown genotype with a recessive






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






15. 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.






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






17. A body cell






18. Selection for the ability to obtain a mate






19. Uses metamorphic or igneous rock - calculates the age of an object by assessing the amount of radioactive element still present in the organism. Radioactive elements are slowly lost over time because of decay.






20. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






21. During transcription an RNA molecule is formed






22. The region of the chromosome that holds the two sister chromatids together during mitosis






23. Organism is preserved at very low temperatures. Preservation of both hard and soft parts can occur.






24. Innate trait; shared ancestry






25. A change in the base sequence of a gene






26. Organ that serves no useful function in an organism






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






28. 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.






29. A codon is made of...






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






31. Selection against one end of a range of variation - resulting in a progressive change in allele frequency






32. Era of recent life that began about 66 million years ago and continues today; includes the first appearance Hominids






33. Cell division that produces reproductive cells or gamates.This occurs in the gonads (testicle and ovaries in animals) Here the chromosome number is halved the original amount. (each new cell has a haploid number = n) All daughter cells are not geneti






34. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






35. Mutation where an extra base is added






36. The offspring of a cross between two inbred lines within a single species. May also refer to the offspring of across between two species






37. Speciation preceded by a period of geographical isolation






38. Building block of a nucleic acid (DNA and RNA)






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






40. Change in allele frequencies as a result of the migration of a small subgroup of a population






41. What happens during the process of translation






42. T or F a codon consist of three nucleotides






43. Building block of a protein






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






45. Mating of 2 oism that differ in 2 characters






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






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






48. Another name for a gene






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






50. A trait that masks the expression of another trait