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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 study relating the evolution of new charateristics to changes in the genes controlling development






2. A type of barrier between species; the species remain isolated because male and femal gametes of the different species cannot fuse - or they die before they unite.






3. An episode of large - scale extinction affecting many different groups of organisms within a short period of time






4. Is a base found in DNA and RNA. Cytosine pairs with Guanine in DNA






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






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






7. Dna moves during electrophoresis because of...






8. A trait that masks the expression of another trait






9. What does DNA stand for...






10. 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






11. Selection acting against the middle of a range of variation






12. Building block of a protein






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






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






15. The gradual changes in gene frequencies in a population due to random events






16. All the genes in a population. genes are added by reproduction and immigration and lost by death and emigration






17. The study of the past and present distribution of species.






18. A geographic gradient in the extent to which a character is developed in a species






19. Determined the complete double helical structure of DNA






20. A nucleotide of RNA is made of...






21. Threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next






22. A limb with five digits (fingers)






23. DNA is made of...






24. Is the evolutionary process whereby a population becomes better suited to its habitat






25. One of the identical rods of a chromosome.






26. Earth's history organized into four eras: Precambrian - Paleozoic - Mesozoic - and Cenozoic






27. The adaptive increase in pigmentation as a result of human - induced pollutants






28. process in which homologous chromosomes exchange portions of their chromatids during meiosis.






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






30. 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.






31. How often a particular gene occurs in the population






32. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






33. Change to a chromosome in which a fragment of the chromosome is removed






34. The backbone of DNA consist of...






35. The preserved remains or traces of an organism that lived in the past






36. A point of overlap of paired chromatids at which fusion and exchange of genetic material (crossing over) occurs during prophase I of meiosis.






37. The comparison of the structures of different organisms






38. Populations that can interbreed with neighboring populations but not with populations separated by larger geographical distances






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






40. Form of reproductive isolation in which two populations reproduce at different times






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






42. Of a cell or organism having two sets of homologous chromosomes or twice the haploid number






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






44. Transcrition occurs in the...






45. All the factors in an organism's surroundings that can potentially affect it






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






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






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






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






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